Westell QI3 DS3 Network Interface Unit with Performance Monitoring CLEI* Code: NCIPCK0DAA

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1 Section Q 203 Equipment Issue Rev. A, November 2010 Westell QI3 DS3 Network Interface Unit with Performance Monitoring CLEI* Code: NCIPCK0DAA CONTENTS PAGE # 1. GENERAL APPLICATIONS CIRCUIT/FUNCTIONAL DESCRIPTION OPTIONS & FEATURES INSTALLATION CRAFT PORT SETUP AND OPERATION PROVISIONING LOOPBACK DS3 TEST PATTERN GENERATOR PERFORMANCE MONITORING TL1 COMMANDS TESTING & TROUBLESHOOTING CUSTOMER & TECHNICAL SERVICES WARRANTY & REPAIRS SPECIFICATIONS GENERAL 1.1 Document Purpose This document describes the Westell QI3 Network Interface Unit, shown in Figure 1. See Table 9 for information concerning other models in the same product family. Hereafter, the QI3 Network Interface Unit will be referred to as the QI Document Status The Issue 3 equipment removes the infrared (IR) functionality. Whenever this document is updated, the reason will be stated here. 1.3 Product Purpose and Description Westell's QI3 DS3 Network Interface Unit with Performance Monitoring serves as an interface between DS3 Network Facilities and customer premise equipment. The QI3 is a DS3 200 MECHANICS plug in module (1/2 the width of a 400 type card, but with a 40 pin connector), allowing up to 24 units to be installed in a single rack mounted shelf. The performance monitoring and remote testing capability of the QI3 allow quick isolation of circuit problems at the point of demarcation. In addition, the unit's signal regeneration provides cost effective extension of DS3 services. 1.4 Product Mounting The QI3 is DS3 200 MECHANICS plug in module (1/2 the width of a 400 type card) and makes electrical connections to Figure 1. Isometric View of QI3 NIU the Facility and sides of the circuit through a 40 pin cardedge connector of a Westell DS3 200 MECHANICS mounting. The QI3 is typically mounted in a DBMA200 series mounting shelf, or equivalent. Westell offers a wide range of mountings available in both wall and rack mount versions for DS3 NIUs. 1.5 Product Features The QI3 offers the following features. DS3 200 MECHANICS plug in module (1/2 the width of a 400 type card) DS3 interface per ANSI T Signal regeneration Network (Single) or Network and (Dual) Loopback operation with remote, local or manual loopback activation/deactivation capability Loopback Timeout option of 20, 60, 120 minutes, 24 hours, or disabled Loss of Signal (LOS) detection Network and side Performance Monitoring (PM) capability with date and time stamped history Event and alarm log with date and time stamping Local Performance Monitoring retrieval capability via a front panel RS 232 Craft Port Remote Performance Monitoring retrieval capability via embedded overhead channel (NPRM) or TL Westell, Inc. All rights reserved. *CLEI is a trademark of Telcordia Technologies. Westell is a trademark of Westell, Inc. Page 1 of 14

2 Section Q Rev. A DSX QI3 NI FIBER MUX RX TX 0 to 450 feet 0 to 450 feet 0 to 450 feet 0 to 450 feet Figure 2. Typical Application Using the Westell PM NIU FIBER MUX DSX QI QI3 NI RX TX (Std. Code) (Alt. Code) 0 to 450 feet 0 to 450 feet 0 to 900 Feet 0 to 450 feet 0 to 450 feet Figure 3. Application Using Two Westell PM NIUs in a Tandem Configuration FIBER MUX DSX QI QI QI3 NI RX TX (Std. Code) (Alt. Code #1) (Alt. Code #2) 0 to 450 feet 0 to 450 feet 0 to 900 Feet 0 to 900 Feet 0 to 450 feet 0 to 450 feet Figure 4. Application Using Three Westell PM NIUs in a Tandem Configuration Monitor access for both Network and side via frontpanel DS3 WECO-440A type monitoring jacks Automatic fail safe operation; transmission paths remain transparent in the event of loss of power Integrated DS3 Level Detection Built in DS3 test pattern generator with pattern selection and far end loopback TL1 command support Meets the following regulatory, safety, or environmental specifications or requirements: Telcordia GR 499 CORE and ANSI T Meets limits of radiated and conducted emissions defined in FCC Part 15 Class A equipment UL , 1st Edition CAN/CSA C22.2 No APPLICATIONS The QI3 provides an interface between a DS3 Facility and the customer interface by terminating a DS3 (44.736Mb/s) High Cap Digital Service derived over a 75 ohm coaxial cable pair. The QI3 also monitors the performance of the DS3 service and isolates service problems. The QI3 can also be used in range extension applications. The primary function of the unit is to provide a maintenance far end loopback along with Performance Monitoring. In addition, it contains a builtin pattern generator for testing purposes. These features aid in sectionalizing circuit problems. 2.1 Location and Mounting The QI3 is installed at the customer premises on the network side of the demarcation point between the Network and. See Figure 2. The mounting assembly used to house the DS3 PM NIU is generally mounted after a multiplexer system. Westell offers a variety of mountings for wall mounted and relay rack applications. The QI3 can be installed between the multiplexer and the with a range of 900 feet on each side of the unit (Figure 2). The unit regenerates the signal in both directions. For automatic fail safe operation during cut thru, a maximum loop length of 900 feet (450 ft. on each side) cannot be exceeded. The NIUs can be installed in tandem to provide additional range extension (Figure 3 and Figure 4). In this configuration, the loopback code for the unit at the network end should be kept at the standard setting, being treated as a standard NIU. 2

3 Rev. A Section Q 203 To avoid conflict, the additional unit(s) must be optioned for an alternate loopback code through the Craft Port. NET References to transmission ranges apply to 728 and 734 type coaxial cable. For applications using 735 type cable (higher loss), all distances should be halved. CBIT M13 LOS=RED AIS 3. CIRCUIT/FUNCTIONAL DESCRIPTION Refer to Figure 5, the QI3 Functional/Block Diagram, as needed, while reading the following circuit description. AIS=YEL PWR/ STATUS 3.1 Side 1 and Side 2 Transmission Paths The QI3 provides transformer coupling on all transmission ports. Both the Side 1 (NET to ) and Side 2 ( To NET) paths provide regeneration of the Network and signals. An optional output attenuator allows the signal level toward the to be reduced by approximately 6dB. 3.2 Monitoring Jacks Two front panel accessible WECO 440A type Jacks provide non intrusive monitoring of the DS3 signals. The test set should be optioned for monitoring to insure proper levels are received. RCV FROM NET: Allows monitoring access to the DS3 signal toward the (ahead of the loopback point) XMT TO NET: Allows monitoring access of the DS3 signal toward the network 3.3 Framing Format and Line Code The Westell PM NIU interfaces DS3 signals using either M13 or C Bit Parity framing formats. LEDs indicate the received Figure 6. Network Loss Of Signal framing format in each path. The unit accommodates AMI line coding using B3ZS format. The unit responds to specific code patterns to activate various features of the unit. Detection of these codes functions reliably with a bit error rate of 10-3 or less on the facility. 3.4 Loss of Signal Detection DS3 signals from the Network are continuously monitored for LOS and control codes. If a loss of signal is detected, the frontpanel NET LOS LED illuminates red and an Alarm Indication Signal (AIS) is sent to the. See Figure 6. DS3 signals from the are continuously monitored for loss of signal. If a loss of signal is detected, the front panel LOS LED lights. In addition, the unit can be configured to send a Loss Of Signal (CLOS) ID or pass the LOS onto the Network whenever the unit detects a loss of signal from the. FROM T NET SIGNAL DETECTOR NET LOS AIS (yellow=ais) (red=los) REGEN SIDE 1 ATTEN NET TO NET CT1 X TO AC1 AC2 +PWR PWR CHASSIS GND POWER SUPPLY PWR ALM (green=pwr ) (red=alarm) CRAFT PORT (RS-232) MICROPROCESSOR CONTROL LOGIC NET C-BIT M13 MAN T1 X CT TO TO NET REGEN SIDE 2 (yellow=ais) (red=los) LOS AIS SIGNAL DETECTOR NET FROM Figure QI3 Block Diagram - Transmission Paths During Normal Operation 3

4 Section Q Rev. A NET QI3 CBIT M13 LOS=RED AIS=YEL AIS, IDLE, Code, or Pass Thru PWR/ STATUS Figure 7. Loss Of Signal ID 3.5 Loss Of Signal (CLOS) ID Upon detecting signal loss from the, the unit can send an AIS (continuous 1010), an idle signal (continuous 1100) or passthru toward the network (see Figure 7). The ID type is selected through the menu based Craft Port. When the signal is restored, the ID signal stops being generated and the unit returns to normal operation. Definitions of AIS and IDLE signals are shown in Table 1. The CLOS ID feature can be remotely disabled for a 20 minute period by sending a loopdown Far End Alarm and Control (FEAC) message to the unit. M Bits Normal F Bits Normal P Bits Normal C Bits 0 X Bits 1 Payload 1010 Pattern (AIS) Payload 1100 Pattern (IDLE) Table 1. AIS/IDLE Definitions Figure 8. Option/Feature Locations 4. OPTIONS & FRONT PANEL FEATURES The QI3 contains features and switch options located on the front and side (PCB) panels, as shown in Figure 8 and as described in the paragraphs that follow. Set any/all manual option switches prior to installing the unit. 4.1 Front Panel Features Monitoring Jacks The unit is equipped with two front panel DC isolated 440Atype monitor jacks labeled XMT MON and RCV MON. RCV MON allows for monitoring signals in the Network to path. XMT MON allows for monitoring signals in the to Network path. Both jacks provide the proper termination resistance. These jacks are labelled to NET and NET to, as shown in Figure Front Panel Status LEDs NET and C BIT: If these LEDs are illuminated, the unit is synchronized to the C Bit framing format. NET and M13: If these LEDs are illuminated the unit is synchronized to M13 framing format. If LEDs are flashing green, the unit is receiving unframed data. NET LOS/AIS: Network signal status. When this LED is illuminated yellow, the unit is receiving AIS from the Network. When this LED is illuminated red, the unit is detecting a LOS from the Network. LOS/AIS: When this LED is lit yellow, the unit is receiving AIS from the Customer. When the LED illuminates red, the unit is detecting a LOS from the. When this LED is flashing red, the unit is generating a CLOS ID signal toward the network. PWR/STATUS: Indicates the power and alarm status of the unit. The LED illuminates green (ON) when power is applied to the unit or OFF if power is not applied. The LED illuminants red to indicate a fuse-alarm condition (i.e., on-board fuse is open). A fuse-alarm condition also activates a relay closure on the mounting assembly. : When this LED illuminates yellow, the unit is in Network Loopback. When LED is flashing yellow, the 4

5 Rev. A Section Q 203 unit is in Dual Loopback mode. When the LED is flashing green, the unit is armed in the Inband Loopback mode Craft Interface Port (RS 232) The front panel RS 232 Craft Port allows local access to performance functions and locally provisioning the unit. See Section 6 for details Push Button Switch The QI3 provides a front panel Manual Loopback push button switch that allows for manual activation/deactivation of the Loopback circuit. See Section 8 for details. 5. INSTALLATION Installation consists of inspecting the equipment for damage, following proper safety precautions, mounting the QI3 in a Westell DBMA200 XX mounting or equivalent, verifying the presence of power and signalling as indicated by the status LEDs (see Section 4.1). The following paragraphs provide detailed instructions for performing these procedures. INSPECTION NOTE Visually inspect the product for damages prior to installation. If damaged in transit, immediately report the damage to the transportation company and to Westell. CAUTION STATIC SENSITIVE This product contains static sensitive components! Proper electrostatic discharge procedures must be followed to maintain personal and equipment safety. Do not store units near magnetic, electromagnetic or electrostatic fields, always store or ship units in Westell's original static protective packaging, and use anti static mats when working on units. PRECAUTIONARY STATEMENT Never install telephone wiring during a lightning storm. Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations. Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the network interface. Use caution when installing or modifying telephone lines. This equipment is intended to be used behind devices that provide primary lightning protection. This equipment is to be installed in a restricted access location. 5.1 Powering Considerations Each shelf is powered from either a +24Vdc or a 48Vdc power source. The mounting also provides an alarm output for external reporting of a local power alarm condition. Connections are provided on each shelf for a back up or redundant power source. The NIU and the mountings are designed for hot insertion and removal, meaning the shelf can be powered when inserting or removing circuit cards. Westell mountings also provide metallic cut thru of the XMT and RCV transmission paths when the card is removed. 5.2 Mounting the Module The QI3 is a DS3 200 MECHANICS plug in module (1/2 the width of a 400 type card) that mounts in a Figure 9. TxD (Transmit Data-OUT) RxD (Receive Data-IN) DTR (Data Terminal Ready) SGN (Signal Ground) Front Panel RS 232 (DB9) DBMA200 XX mounting assembly (or equivalent mounting which matches the pin out plan of the module). The module is designed for use on the network side of the circuit. Before installing the module, set any option switch(es) to the desired position(s). Align the module with the mounting or assembly card guides above and below the unit and insert as far as it will go into the slot connector. CAUTION Use care when installing and removing modules do not force a module into place. If a module resists insertion, remove it and check for obstructions in or near the module's or shelf's connectors and mounting slots. The module may then be carefully aligned and gently re inserted. 5.3 Making Installer Connections The unit makes electrical connection when installed and properly seated in the 40 pin card edge connector of the mounting assembly and connected to the DS3 connectors on the front panel. No installer connections are required for the unit other than inserting the module into the card edge connector in the shelf or assembly and making the DS3 connections. 6. CRAFT PORT SETUP AND OPERATION 6.1 Craft Port The Craft Port is a DB 9 connector with an electrical RS 232 female interface in a DCE configuration. The device used to interface the Craft Port can be a terminal operating in the VT 100 protocol or a PC running a VT 100 emulation program. If a VT 100 type terminal is used, a null modem cable may be required between the terminal and the NIU. If a PC with a VT 100 emulation program is used, such as HyperTerminal or ProComm, a standard RS 232 cable can be used. The RS 232 port should be set up as follows: 9600 baud flow control set to None 8 data bits no parity one stop bit Select emulation as VT 100 Figure 9 shows electrical connections to the RS 232 Craft Port. 6.2 Password and Main Menu Screens Once connected, a Password Menu appears. The password for this unit is fixed. It is hniu (case insensitive). This password cannot be changed. Upon entering the password, the Main 5

6 Section Q Rev. A ***** NIU DS3 MAIN MENU ***** ***** Westell Model QI3 ***** ***** MAIN OPTION MENU ***** (ESC).RETURNS TO MAIN OPTION MENU 1. CIRCUIT Information, Date, Time Menu 2. PROVISION Options 3. CIRCUIT Status 4. PATTERN Testing 5. CURRENT Performance Statistics 6. Performance History 7. CUSTOMER Performance History 8. EVENT Log 9. ALARM Log 10. CLEAR Performance History Memory 11. DOWNLOAD PM Data/Event Log/Alarm Log 12. CONTACT Information Enter NUMBER for Menu Selection: Figure 10. Main Menu Screen T.O. Duration: 20m/60m/120m/24hr LOOPBACK: Network or Dual MLB Button: Enable/Disable PM Threshold: 10-6, 7.5x10-5 NPRM Mode: Enable/Disable NET Frame Detect: Auto, C-Bit, M13 Frame Detect: Auto, C-Bit, M13 Inband Loopback: Enable/Disable TX Level to Customer: Normal/Low ***** CIRCUIT INFORMATION MENU ***** CLEI: NCIPCK0DAA Current New Current Date: 11/05/2007 1) / / (MM/DD/YYYY) Current Time: 13:55 2) : (HH:MM) Military Time Circuit I.D.: 3) {UNIT 4 } Installation Date: 9/22/2007 4) / / (MM/DD/YYY) Notepad: 5) { } { } { } { } { } { } { } { } { } { } Enter NUMBER to change entry Figure 11. Circuit Information Screen Menu, shown in Figure 10, is displayed and the craftsperson can then select the appropriate Item from the menu. 7. PROVISIONING Provisioning for the unit is accomplished locally via the menubased software provisioning or remotely via TL1 commands. The local menu system is accessed via the front panel DB 9 Craft port connector. 7.1 Circuit Information Screen The Circuit Information screen, shown in Figure 11, allows the craftsperson to enter and review date, time and general circuit details. Circuit information needs to be entered for correct time and date stamping. 7.2 Provisioning Menu Screen The Provisioning Menu screen, shown in Figure 12, allows the craftsperson to establish settings for the various options. Simply enter the letter of the setting to be provisioned. In addition, the settings may be saved as a custom default when required. The following options can be provisioned: Default values for the options are identified in bold and italic type. CLOS ID: AIS, Idle or Passthru Remote T.O.: Enable/Disable Manual T.O.: Enable/Disable ***** PROVISION OPTIONS ***** Current New CLOS ID Selection AIS 1) Passthru 2) Idle Remote Lpbk Timeout Enable 3) Disable Manual Lpbk Timeout Disable 4) Enable Timeout Duration 20 Min 5) 60 Min 6) 120 Min 7) 24 Hour Manual Loopback Type Network 8) Dual MLB Button Enable 9) Disable PM Threshold Setting ) 7.5x10 5 NPRM Mode Enable 11) Disable NET Frame Detect Auto 12) C Bit 13) M13 Frame Detect Auto 14) C Bit 15) M13 FEAC Loopback Code X 16) 12H (STD) 17) 04H ) 16H Inband Loopback Enable 19) Disable TX Level to Customer Normal 20) Low Factory Default Settings 21) Enter NUMBER to change entry Figure 12. Provision Options Menu Screen Loss Of Signal ID Selection (CLOS ID) The Customer LOS Identifier LED (CLOS ID), is set to respond to a loss of signal condition from the side of the unit. The unit can be provisioned to send AIS or IDLE code, or can be provisioned for the pass through mode where the LOS condition is passed on toward the Network Remote Loopback Timeout Remote Loopback Timeout can be set to either enable or disable the timeout feature for remotely activated loopback Manual Loopback Timeout Manual Loopback Timeout can be set to either enable or disable the 20/60/120 minute and 24 hour feature for manually activated loopback Timeout Duration Timeout Duration allows the craftsperson to select the duration of the timeout if enabled. The choices are 20/60/120 minute and 24 hour Manual Loopback Type Manual Loopback Type allows the craftsperson to choose either Network or Dual loopback to be controlled from the front panel pushbutton MLB Button Manual Loopback control from the front panel push button can be enabled or disabled through the Provisioning menu. Refer to Section 10 for additional manual loopback details. 6

7 Rev. A Section Q PM Threshold Settings A threshold setting of either 10-6 or 7.5x 10-5 defines the point at which Severely Errored Seconds (SES) are declared NPRM Mode Insertion of Network Performance Report Messages (NPRMs) by the unit into the DS3 overhead for remote PM retrieval can be enabled or disabled Framing Detection Option (C Bit or M13) The unit can be configured to monitor specific framing patterns (C Bit or M13) and provide a flashing LED indication if a mismatch or Loss Of Frame (LOF) condition occurs. Alternately, framing detection can be set for Auto mode in which both framing types are monitored and indicated via front panel LEDs. This option can be set for Network and framing independently. When AUTO mode is selected via the Provisioning screen: If C Bit framing is received, CBIT LED is ON, M13 LED is OFF. If M13 framing is received, M13 LED is ON, CBIT LED is OFF. If no framing is received, both the M13 and the CBIT LEDs flash. When C Bit mode is selected via the Provisioning screen: If C Bit framing is received, CBIT LED is ON, M13 LED is OFF. If M13 framing is received, M13 LED flashes and CBIT LED is OFF, indicating a framing mismatch. If no framing is received, both the M13 and the CBIT LEDs flash. When M13 mode is selected via the Provisioning screen: If M13 framing is received, the M13 LED is ON, the CBIT LED is OFF. If C Bit framing is received, CBIT LED flashes and M13 LED is OFF, indicating a framing mismatch. If no framing is received, both the M13 and the CBIT LEDs flash FEAC Loopback Codes One of three FEAC codes can be selected to remotely activate the Loopback function. See Section 8 for additional details Inband Loopback Inband Loopback allows the craftsperson to enable or disable the inband detection of loopback codes TX Level to Customer The transmit level to the customer allows the craftsperson to set the level to the customer to either a normal or a low level. The low setting attenuates the signal by approximately 6dB Factory Defaults This option resets all provisioning values to the original factory settings Remote Provisioning NET CBIT M13 LOS=RED AIS=YEL PWR/ STATUS X X Figure 13. Network Loopback LED flashes during Dual Loopback NET CBIT M13 LOS=RED AIS=YEL PWR/ STATUS Figure 14. Dual Loopback Most options may be remotely set via TL1 commands. Refer to Section LOOPBACK Loopback is used during maintenance and circuit troubleshooting to verify the integrity of the DS3 facility. Testing can be performed with a standard DS3 test set or test head conforming to ANSI interface specifications. Two types of loopback conditions are supported on this unit; Network and Dual. Network loopback takes the signal from the network and loops it through the unit back towards the network (See Figure 13). The unit loops back the signal at the metallic interface to ensure that all components of the NIU are included in the path. In this loopback mode, the signal is terminated. Dual loopback takes the signal from the network and loops it back (logic loopback) towards the network. At the same time, signal received from the port is looped back towards the (Refer to Figure 14). 8.1 Loopback Activation/Deactivation Loopback activation/deactivation can be accomplished in one of two ways: 1. Remotely via control codes from a test location 7

8 Section Q Rev. A 2. Locally via the front panel (Manual Loopback) push button switch or menu based Craft Port. The Provisioning menu also allows the front panel switch to be disabled. In network loopback, the LED illuminates and the signal is terminated. In the dual loopback mode, the LED flashes. 8.2 Remote Loopback Operation FEAC Codes When using C Bit parity framing, the Network Service Provider can use the FEAC codes to send loop up and loop down codes to the unit. FEAC codes are sent through an embedded communication channel within the C Bit framing. The unit responds to 10 consecutive repetitions of the FEAC code to activate or deactivate network loopback (see Table 2). After removing the Loopback Activate Code for a minimum of 5 seconds, the code can be reapplied to remotely activate a dual loopback condition. Loopback Activate Loopback Deactivate Table sent >10 repetitions sent >10 repetitions Standard Loopback FEAC Codes When loopback is activated, a 20, 60 or 120 minute or the 24 hour Loopback Timeout feature is also activated, if enabled. Loopback automatically times out and the unit returns to normal operation after the selected time frame, unless the unit receives a loop down code or if loopback is manually removed. 8.3 Programmable Loopback FEAC Codes The FEAC code used for loopback activation can be user-programmed via the Craft Port. The allowable codes are shown in Table 3. Provisioning for an alternate loopback activation code is useful when units are used in tandem on a circuit, allowing each unit to be looped back individually. See the Provision Options Menu screen, Figure 12. (12H) (Standard) (04H) (Alt #1) (16H) (Alt #2) Table 3. User Programmable FEAC Loopback Activation Codes 8.4 Remote Loopback Operation - In Band In band Loopback is supported in both C Bit and M13 framing modes. The In Band Loopback procedure is a two step process. The unit is armed by sending a 7 bit pattern ( ) within the DS 3 payload blocks for at least five seconds. When the arming signal is received for five seconds, the NIU begins a 20 second timeout period. During this timeout period, if the NIU detects a 16 bit loopback signal ( ), the unit switches to the loopback state. If the loopback signal is not detected within a 20 second period, the NIU returns to normal (unarmed) operation. To deactivate loopback, a 7 bit deactivation code ( ) is sent to the NIU Manual Loopback Activation Manual Loopback activation is accomplished by pressing and releasing the front panel push button switch. It can also +05.0dBdsx < NET > ***** PATTERN TESTING ***** NIU3 Pattern Errors Sync Network NO Customer NO > < 1. Send Pattern to Network 2. Deactivate Pattern to Network 3. Send Pattern to Customer 4. Deactivate Pattern to Customer 5. Framing for Pattern C BIT 6. Timing Source for Pattern NTWK 7. Insert Bit Error 8. Reset Pattern Error Counters 9. Pattern Selection: 2^23 1 Enter Selection: Figure 15. Pattern Testing Screen be activated via the Craft Port. When the switch is pressed and released, the LED illuminates, indicating loopback activation. Manual loopback type (Network or Dual) is selected via the Craft Port and the Provisioning Menu. The Provisioning Menu also allows the front panel switch to be disabled Manual Loopback Deactivation In the Network or Dual Loopback mode, press and release the front panel switch a second time to loopdown the unit. Manual loopback can also be deactivated via the Craft Port or by sending the Loopback Deactivation code from the Network side. 8.5 Loopback Timeout The unit features a timeout option that can be set to automatically release the unit from loopback after 20, 60 or 120 minutes or 24 hours. After the selected time out period expires, the unit returns to normal operation. The Loopback Timeout feature can be either enabled or disabled for both remote and manual loopback independently via local provisioning. The Loopback Timeout feature can also be temporarily disabled remotely by sending the code The Loopback Timeout feature returns to its previous setting upon loopback deactivation. 9. DS3 TEST PATTERN GENERATOR 9.1 Pattern Testing Screen The Pattern Testing screen, shown in Figure 15, allows stress patterns to be sent by the NIU toward either the network or the. In addition, the NIU monitors return signals and displays the measured bit error rate on the screen. This screen is accessible from the Main screen by selecting 4, Pattern Testing. Exiting the pattern test screen will abort the test. To send a pattern to the network, select 1 from the Pattern Testing screen using the Craft Port. Verify receipt of the test pattern using a test set or the built in error counter. To deactivate the pattern, select 2 or B. To send a pattern to the, select 3 from the Pattern Test screen. Verify receipt of the test pattern using a test set or the built in error counter. To deactivate the pattern, select 4 or D. To change the framing for the pattern, select 5. The available choices are C BIT, Unframed and M13, as shown in Figure 16. 8

9 Rev. A Section Q 203 ***** DS3 PATTERN SELECTING SCREEN ***** ***** Model QI3 ***** 1. CBIT 2. M13 3. UNFRAME PRESS *** Esc *** to return to previous screen Enter Selection: Figure 16. DS3 Pattern Framing Screen To select a timing source for the pattern, select 6. The available choices are NTWK and LOCAL, as shown in Figure 17. ***** DS3 TIMER SELECTING SCREEN ***** ***** Model QI3 ***** 1. LOCAL 2. PRESS *** Esc *** to return to previous screen Enter Selection: Figure 17. DS3 Timer Selecting Screen The LOCAL setting is only used for testing purposes. Make sure that the timing source is set to for normal operation. To insert a bit error into the pattern, select 7 from the Pattern Test screen. To reset the pattern counters, select 8 from the Pattern Test screen. In order to select a different pattern for testing, select 9 from the Pattern Test screen. This displays the DS3 Pattern Selecting Screen, shown in Figure 18. ***** DS3 PATTERN SELECTING SCREEN ***** ***** Model QI3 ***** 1. 2^ QRSS 3. BLUE 4. IDLE 5. USER 6. ARM ( ) 7. Loopback ( ) 8. DISARM ( ) PRESS *** Esc *** to return to previous screen Enter Selection: Figure 18. DS3 Pattern Selecting Screen 9.2 Using Pattern Testing to Loopback Far End Unit The following procedure is employed when the pattern generator is used to loopback a far end unit. Refer to Figure 20 and Table From the Main Menu, select 4, Pattern Testing. 2. From the Pattern Testing Menu, select 9, Pattern Selection. 3. In the Pattern Selection Menu, select 6, ARM ( ). Once the ARM pattern is selected, the screen will return to the Pattern Testing Menu. 4. To ARM the remote unit on the Network Side, select 1, Send Pattern to Network. To ARM the remote unit on the Customer Side, select 3, Send Pattern to Customer. 5. The Pattern Testing menu will now show ARM being transmitted in the direction chosen in Step 4. Allow pattern to be sent for approximately five seconds before moving on to the next step. Inband Test Codes Description (2E23h) 2^ (D742h) Idle (D741h) Blue (2E20h) QRSS (D743h) User Defined Table 4. Remote Pattern Generator 6. Select 9, Pattern Selection, then select 7 in the Pattern Selection Menu, ( ). Once the pattern is selected, the screen will return to the Pattern Testing Menu. The Pattern Testing Menu will now show being transmitted in the direction selected. After a few seconds, the SYNC indicator will show YES. This means the remote unit has looped back. 7. Select 9, Pattern Selection, then select either 1, 2^23-1 or 2, QRSS, in the Pattern Selection Menu. With the far end unit now looped back, round trip pattern testing can be performed. Once the pattern is selected, the screen will return to the Pattern Testing Menu, and show the selected pattern being sent toward the looped back far end unit. The SYNC indicator should be showing YES, and the error counter is tracking bit errors. The error counter is reset by selecting 8, Reset Pattern Error Counters. 9.3 Loopdown Procedure The following procedure is used to remove loopback from the far end unit. 1. To loopdown the far end unit, select 9, Pattern Selection Menu. In the Pattern Selection Menu, select 8, DISARM ( ). Once DISARM is selected, the screen will return to the Pattern Testing Menu, and show DARM being sent to the remote unit. The SYNC indicator will change to NO, signifying that the far end unit has looped down. 2. To turn off the pattern generator on the Network Side, select 2, Deactivate Pattern to the Network. To turn off the pattern generator on the Customer Side, select 4, Deactivate Pattern to the Customer. 3. Press ESC to return to the Main Menu. 4. To turn off the pattern generator on the Network Side, select 2, Deactivate Pattern to the Network. To turn off the pattern generator on the Customer Side, select 4, Deactivate Pattern to the Customer. 5. Press ESC to return to the Main Menu. 10. PERFORMANCE MONITORING The QI3 continuously monitors and records the performance of DS3 service in both the transmit and receive 9

10 Section Q Rev. A directions. Circuit status and performance history are retrievable from the Craft Interface of the NIU. Performance history is also reported remotely via ANSI standard messages in the overhead channel. In addition, performance data can be accessed through TL1 commands. Refer to Section 11 for details Circuit Status The QI3 provides a Circuit Status screen that summarizes current transmission conditions, see Figure 19. The Circuit Status screen includes a measurement of the DS3 signal strength being received from the Network and sides. ***** CIRCUIT STATUS ***** QI3 DS3 NIU RCV from Network dbdsx XMT to > Framing: C Bit Parity RCV Alarm: None < XMT to Network Loopback Timeout: Circuit I.D.: UNIT 4 Installation Date: 11/22/2007 PRESS L to toggle Loopback > Framing: C Bit Parity RCV Alarm: None < 00.0 dbdsx RCV from Figure 19. Typical Circuit Status During Normal Operation Line Anomalies Bipolar Violations Excessive Zeros Line Defects and Failures Loss of Signal Path Anomalies C Bit Parity Error Path Defects and Failures Out of Frame Severely Errored Frame Alarm Indication Signal Remote Alarm Indication Table 5. BPVs EXZs LOS CBPR OOF SEF AIS RAI Performance Primitives 10.2 Performance Primitives Performance primitives are events that provide the foundations to store performance of the DS3 service. Primitives are single events that may be grouped to provide the building block for creating performance parameters. The categories under the performance primitives are shown in Table Performance Parameters Performance parameters are comprised of single or grouped performance primitives. Performance parameters are stored in non volatile memory for retrieval. The categories for performance parameters are shown in Table 6. Line Parameters Errored Seconds Severely Errored Seconds Unavailable Seconds Code Violation Loss of Signal Seconds Path Parameters Errored Seconds Severely Errored Seconds Unavailable Seconds Code Violation, P bit Code Violation, CP bit Errored Second, P bit Errored Second, CP bit Severely Errored Second, CP bit Far End Parameters Code Violation, CP bit Errored Second, CP bit Severely Errored Second, P bit Unavailable Second, CP bit Other Parameters Severely Errored Frame Seconds Far End Bit Errors Severely Errored Frame/Alarm Indication Signal (SEF/AIS) Second Alarm Indication Signal Seconds Table 6. Performance Parameters ES SES UAS CV LOSS ES SES UAS CVP CVCP ESP ESCP SESCP CVCP ESCP SESP UASCP SEFS FEBE SAS AISS 10.4 Performance Storage Registers Performance Storage Registers provide historical information pertaining to the Network and Customer DS3 service. The QI3 records this information in 15 minute, 1 hour, daily and monthly intervals up to three months (see Table 7) and stores this information in memory for later retrieval. Access to this information is accomplished via the Craft Port. Example screens are shown in Figure 21 to Figure 27. Classification Status Previous 15 Minutes Current 100 Intervals 1 Hour Current 60 Intervals 1 Day Current 31 Intervals 1 Month Current 3 Intervals Table 7. Performance Storage Information A Loopback Controls and Test Patterns QI QI3 Figure 20. Far End Loopback using Internal DS3 Pattern Test Generator Z 10

11 Rev. A Section Q 203 ***** CURRENT PERFORMANCE STATISTICS ***** Current Performance Menu 1. Current Summary Performance Statistics 2. Current Expanded Performance Statistics 3. Current Path Far End (PFE) Performance Statistics Enter NUMBER for Menu Selection Press *** Esc *** to return to MAIN MENU Figure 21. Network Performance History Menu ***** CURRENT SUMMARY PERFORMANCE STATISTICS ***** Date: 12/05/2007 Time: 23:56 LINE PATH DATE TIME ES SES UAS ES SES UAS SEFS FEBE MSEC 02/05/ :15 Current 15 Minute Interval 511 Network Customer /05/ :14 Current 1 Hour Interval 0559 Network Customer /05/ :14 Current 1 Day Interval Network Customer /05/ :14 Current 30 Day Interval Network Customer PRESS *** Esc *** to return to CURRENT P.M. MENU Figure 22. Current Summary Performance Statistics Screen ***** PERFORMANCE STATISTICS ***** Summary Performance History 1. Previous 100, 15 Minute Intervals 2. Previous 60, 1 Hour Intervals 3. Previous 31, 1 Day Intervals 4. Previous 3, 30 Day Intervals Expanded Performance History 5. Previous 100, 15 Minute Intervals 6. Previous 60, 1 Hour Intervals 7. Previous 31, 1 Day Intervals 8. Previous 3, 30 Day Intervals Summary Performance History 9. Previous 100, 15 Minute Intervals 10. Previous 60, 1 Hour Intervals 11. Previous 31, 1 Day Intervals 12. Previous 3, 30 Day Intervals Enter NUMBER for Menu Selection Figure 25. Network Performance History Menu ***** SUMMARY PERFORMANCE HISTORY ***** Date: 12/05/2007 Time: 18:28 Previous 100, 15 Minute Intervals LINE PATH DATE TIME ES SES UAS ES SES UAS SEFS FEBE 02/05/ : /05/ : /05/ : Page 1 of 9 PRESS P for previous screen PRESS N for next screen PRESS *** Esc *** to return to HISTORY MENU Figure 26. Typical Network Summary Performance History ***** CURRENT EXPANDED PERFORMANCE STATISTICS ***** Date: 12/05/2007 Time: 23:56 ***** CLEAR PERFORMANCE HISTORY MEMORY ***** LINE PATH DATE TIME CV LOSS CVP CVCP ESP ESCP SESCP SAS AISS 02/05/ :15 Current 15 Minute Interval Network Customer /05/ :14 Current 1 Hour Interval Network Customer /05/ :14 Current 1 Day Interval Network Customer /05/ :14 Current 30 Day Interval Network Customer PRESS *** Esc *** to return to CURRENT P.M. MENU Figure 23. Current Expanded Performance Statistics CURRENT PATH FAR END (PFE) PERFORMANCE STATISTICS Date: 12/05/2007 Time: 23:56 PATH FAR END DATE TIME CVCP ESCP SESCP UASCP 02/05/ :15 Current 15 Minute Interval Network Customer /05/ :14 Current 1 Hour Interval Network Customer /05/ :14 Current 1 Day Interval Network Customer /05/ :14 Current 30 Day Interval Network Customer PRESS *** Esc *** to return to CURRENT P.M. MENU Figure 24. Current Path Far End Performance Statistics 1. Clear Performance Memory 2. Clear Event/Alarm Log 3. Clear All ***** Enter NUMBER for Menu Selection ***** Figure 27. Clear Performance History Menu 10.5 Remote NPRM Retrieval The NIU may be provisioned to send Network Performance Report Messages (NPRM) for retrieval through remote test or monitoring systems. Messages are sent for the following intervals through the DS3 overhead channel as specified in ANSI T Current 15 minutes Previous 15 minutes Current 24 hours Previous 24 hours 10.6 Event and Alarm Log Screens The Event and Alarm Log screens, shown in Figure 28 to Figure 31, provides the craftsperson with detailed logs for the unit. It also allows the craftsperson to clear the log and continue logging new events. The Event Log has a capacity of 8 pages with 25 events per page, for a total of 200 events displayed. The Alarm log has a capacity of 8 pages with 25 alarms per page, for a total of 200 alarms displayed. 11

12 Section Q Rev. A ***** EVENT LOG ***** Date: 12/05/2007 Time: 14:13 DATE TIME EVENT DATE TIME EVENT 11/05/ :35 POWER RESTORED 11/05/ :35 LOSS OF POWER 11/05/ :45 POWER RESTORED 11/05/ :45 LOSS OF POWER 11/05/ :01 PMON REGISTER RESET 11/05/ :01 EVENT/ALARM LOG RESET PRESS P for previous screen PRESS N for next screen Figure 28. Typical Event Log Screen ***** ALARM LOG ***** Date: 12/05/2007 Time: 14:13 DATE TIME EVENT DATE TIME EVENT 12/05/ :52 LOS Page 1 of 8 PRESS P for previous screen PRESS N for next screen Figure 29. Typical Alarm Log Screen ***** DOWNLOAD PM DATA / EVENT LOG / ALARM LOG ***** 1. Download Performance Data History 2. Download Event Log 3. Download Alarm Log Enter NUMBER for Menu Selection Figure 30. Download PM Data/Event/Alarm Log Menu ***** DOWNLOAD PM DATA / EVENT LOG / ALARM LOG ***** Instructions for downloading: Using Hyperterminal: 1) Click on the Transfer menu. 2) Click on Receive File... 3) Select folder to place the file in. 4) Select Xmodem as the protocol, and Click Receive. 5) Enter a filename for the received file. (filename.txt) 6) Click OK to start download. Using ProComm: 1) Press <Page Down> key. 2) Select Item 1) XMODEM. 3) Enter Path and Filename to save to. (C:\path\filename.TXT) 4) Press <ENTER> to start download. Note: Error Checking = Checksum Figure 31. Download PM Data/Event/Alarm Instruction 11. TL1 COMMANDS The QI3 allows maintenance personnel to use TL1 commands for remote provisioning, data manipulation and retrieval of the event log. A list of TL1 commands that the unit recognizes are shown in Table 11 and Table TESTING & TROUBLESHOOTING 12.1 Testing. Initial testing consists of performing basic test procedures using the unit's internal pattern generator or standard DS3 test equipment (T Berd, Sunrise, REACT or equivalent) to verify the unit's basic functions, such as loopback and signal regeneration, and verify that the LEDs are operating properly. This equipment should not be field repaired. If the equipment is suspected of being faulty, replace it with another unit, optioned identically, and retest. If the replacement unit operates correctly, the original unit may be faulty and should be returned to Westell for repair or replacement (Paragraph 14.2). Westell contact information (Figure 32) can be accessed by selecting 12 from the Craft Port Main Menu. ***** CONTACT INFORMATION ***** Westell, Inc. For Technical Support Call: (800) Internet: Westell Model QI3 DS3 NIU CLEI: NCIPCK0DAA Hardware Release: Rev. A3 Software Release: Figure 32. Contact Information Menu 12.2 Troubleshooting. If trouble is encountered, verify all installer connections to the assembly and check that the CO power fuse is not blown. Also verify all module connections and option switch settings, and verify the modules are making a positive connection with the shelf connector. If trouble persists, replace the suspect unit and repeat procedures outlined. These procedures are not designed to effect repairs or modifications. Any tests beyond those outlined herein, or repairs made beyond replacing a faulty unit, are not recommended and may void the warranty. 13. CUSTOMER & TECHNICAL SERVICES If technical or customer assistance is required, contact Westell by calling or using one of the following options: Voice: (800) Visit the Westell World Wide Web site at for additional information about Westell. 14. WARRANTY & REPAIRS 14.1 Warranty. Westell warrants this product to be defect free at shipment time and warrants this product to be fully functional for the time period specified by the terms and conditions governing the product sale. Equipment repair/modification attempts by anyone other than authorized Westell representatives will void the warranty Repair and Return. Westell will repair/replace any defective Westell equipment without cost during the warranty period if the unit is defective for any reason other than abuse, improper use, or improper installation. To return defective equipment, first request a Return Material Authorization (RMA) number from Westell by calling or using one of the options shown below: after an RMA number is obtained, return the defective unit (freight prepaid) and a brief problem description to the address we will provide to you when you contact us. Voice: (630) Replacements will be shipped in the fastest manner consistent with the urgency of the situation. Westell will continue to repair or replace faulty equipment beyond the warranty period for a nominal charge. Contact Westell for details. 12

13 Rev. A Section Q 203 TL1 Command Options Description INIT REG COM SET DAT RTRV HDR RTRV LOG This command reset all PM stored data to zero. Command Syntax: INIT REG COM : [ <tid> ] : [ <aid> ] : <ctag> : This command changes the system date and time. Command Syntax: SET DAT : [ <tid> ] : [ <aid> ] : <ctag> : YYMMDD,HHMMSS YYMMDD HHMMSS Year, Month and Day Hour, Minute and Second This command is used for communication. Command Syntax: RTRV HDR : [ <tid> ] : [ <aid> ] : <ctag> : This command is used to retrieve event log data for the event or page. Command Syntax: RTRV LOG : [ <tid> ] : [ <aid> ] : <ctag> : : LOG1 <length> n En If <length> = E return single event number n where 1 < n < 200 Pn If <length> = P return page n where 1 < n < = 40 This command is used for querying all the PM stored data Command Syntax: RTRV PM COM : [ <tid> ] : [ <aid> ] : <ctag> : <montype>,,, [ <dirn> ], [ <tmper> ], [ <mondat> ],{ <montm> ] Note: If the <mondat> and <montm> parameters are ignored, the default will be the current time period. RTRV PM COM RTRV T3 Montype ESL, SESL,UASL, ESP, SESP, UASP Dirn tmper mondat montm AZ (Network to Customer direction), ZA (Customer to Network direction) 1 HR, 1 DAY MM DD (Month and date), if (MM DD is blank) default is current date and time. HH MM, if (HH MM is blank) default is current date and time specified by tmper. MM is either 00, 15, 30 or 45 minutes This command is used to query all the NIU provision parameters. Command Syntax: RTRV T3 : [ <Tid> ] : [ <aid> ] : <ctag> : : : : <optnm> optnm Values are: HETLOSRSP,HERTPM, HETHRLV, HERMDLK, HEMANLK, HELBTO, HEMLBMODE, HEFEAC, HESDEF, HENETFRAME, HEFRAME, HECKTID Table 8. TL1 Command Options 15. SPECIFICATIONS 15.1 Ordering Specifications To order units, call the telephone number shown in Part 13 and please specify a specific model number shown in Table 9. Model # QI3 DBMA DBMA DBMA200 03FA DBMA DBMA DBMAWB 24 Description QI3 DS3 NIU with Performance Monitoring CLEI* Code: NCIPCK0DAA. Barcode/ECI: CPR: S Mounting Options for use with the QI3 DBMA200 01, Single Position DS3 Mounting CLEI* Code: NCM2WX0DRA. Barcode/ECI: CPR: DBMA200 03, 3 position DS3 Mounting CLEI* Code: NCM2XM0DRA. Barcode/ECI: CPR: DBMA200 03FA, 3 position DS3 Mounting CLEI* Code: T3M3D00CRA. Barcode/ECI: CPR: DBMA200 12, 12 position DS3 Mounting CLEI* Code: NCM2YN0DRA. Barcode/ECI: CPR: N DBMA200 24, 24 position DS3 Mounting CLEI* Code: NCM2YY0DRA. Barcode/ECI: CPR: Model DBMAWB 24 DS3 Wall Mounting Bracket *CLEI is a trademark of Telcordia Technologies. Table 9. Ordering and Option Information 15.2 Regulatory/Agency Specifications The QI3 module meets the following regulatory, safety, or environmental specifications or requirements: Telcordia GR-499-CORE and ANSI T Meets limits of radiated and conducted emissions defined in FCC Part 15 for Class A equipment UL , 1st Edition CAN/CSA C22.2 No Electrical and Physical Specifications The electrical and signalling specifications are listed below, and the physical specifications are shown in Table 10. A. DS3 Interface: Per ANSI T B. DS3 Pulse Shape: Per Telcordia GR-499-CORE and ANSI T C. Jitter Tolerance: Per Telcordia GR-499-CORE D. Line Rate: Mb/s (±20ppm) E. Line Impedance: 75 Ohms (±20%) at MHz F. Receiver Sensitivity Range: 0 to 900 feet of 728 or 734 type cable G. Loopback activation/deactivation via FEAC or in band codes 13

14 Section Q Rev. A H. Maximum Detect Error Rate: <10-3 I. Loopback Timeout: 20/60/120 Minutes or 24 Hours or disabled J. Manual Loopback Control: push button switch or via Craft menu interface selection K. Power: 22 to 56Vdc; can be powered from 48Vdc or a +24Vdc source L. Current Draw: -48Vdc Physical Feature U.S. Metric Height 5.6 in cm Width 0.7 in. 1.8 cm Depth 5.9 in. 15 cm Weight (approx.) 12 oz. 340 g Operating Temp. 40 to 149 F 40 to 65 C Humidity 0 to 95% (non condensing) Table 10. Physical Specifications Provision Commands Syntax: ED-T3:::<CTAG>:::<OPTION>=<PARAMETER>; Note: <CTAG>= Up to 6 Character label <OPTION> <PARAMETER> TL1 Response Notes PTHRU HETLOSPSP=PTHRU HETLOSRSP IDLE HETLOSRSP=IDLE Sets the LOS Response to the desired action AIS HETLOSRSP=AIS HERMLBTO DIS HERMLBTO=DIS ENA HERMLBTO=ENA Enables or disables the remote LBTO HEMNLBTO DIS HEMNLBTO=DIS ENA HEMNLBTO=ENA Enables or disables the manual LBTO 20 HELBTO=20 HELBTO 60 HELBTO= HELBTO=120 Sets the Loopback Timeout to the desired setting 24HR HELBTO=24HR HEMLBMODE NET HEMLBMODE=NET DUAL HEMLBMODE=DUAL Places the loopback function in network or dual mode HETHRLV HERTPM HENETFRAME HEFRAME HEFEAC 1E 6 HETHRLV=1E 6 Set DS3 PM errors threshold level either 10 E6 or 7.5E 5 HETHRLV=7.5E E 5 NONE NPRM AUTO CBIT M13 AUTO CBIT M13 12H 04H 16H HERTPM=NONE HERTPM=NPRM HENETFRAME=AUTO HENETFRAME=CBIT HENETFRAME=M13 HEFRAME=AUTO HEFRAME=CBIT HEFRAME=M13 HEFEAC=12H HEFEAC=04H HEFEAC=16H Enable/Disable NPRM Reporting Sets the network side of the unit to the proper framing detection option Sets the side of the unit to the proper framing detection option Configuration value for FEAC(Far End Alarm Control) HETRMTLBO DIS HETRMTLBO=DIS Enables or disables the 6dB transmit pad to the customer. ENA HETRMTLBO=ENA HESDEF RESET HESDEF=RESET Resets Provision options to factory defaults HECKTID <Enter Circuit ID> HECKTID=<Circuit ID> Character string of 32 characters max for circuit ID HEMANLB DIS HEMANLB=DIS Enables or disables the manual loopback button HEMANLB ENA HEMANLB=ENA Enables or disables the manual loopback button HEINBDLB DIS HEINBDLB=DIS Enables or disables use of the inband loopback function ENA HEINBDLB=ENA Table 11. Provisioning Commands 14