TFR5755 T1 Fiber Repeater

Transcription

1 Section TFR--201 Equipment Issue 1, June 2009 TFR T1 Fiber Repeater CLEI* Code: NCRPB0AAAA PART # PAGE # 1. GENERAL APPLICATIONS CIRCUIT DESCRIPTION OPTIONS & PHYSICAL FEATURES INSTALLATION REMOTE MAINTENANCE OPERATION TESTING & TROUBLESHOOTING CUSTOMER SERVICE WARRANTY & REPAIRS SPECIFICATIONS ACRONYMS & ABBREVIATIONS GENERAL 1.1 Document Purpose This practice describes the Westell TFR T1 Fiber Repeater module, shown in Figure PWR LPBK CO LOS CPE + SPAN CURRENT - T F R - NOTE - Hereafter, the TFR will be referred to as the TFR module. 1.2 Document Status This Revision B document deletes the previous Figure 2 and list item S from Paragraph 10.1, updates Paragraph 1.3.4, Paragraph 1.4, Table 2, Table 3, Figure 4 and Figure, changes all CP0INT instances to CP0HINT, and adds list items Q, R, and U in Paragraph Revision A replaced practice and updated the company contact information. Whenever this practice is updated, the reason will be stated in this paragraph. 1.3 Product Purpose & Description The Westell TFR T1 Fiber Repeater module is a 400-mechanics-type plug-in module that operates in a T1 span line to extend the DS1 signal over a single-mode fiber cable link. The other end of the fiber link is terminated by a Westell FNI6 Fiber Network Interface (FNI) at the customer installation that is a wireless cell site located adjacent to an electrical power facility. The fiber optic transmission link provides dielectric isolation between the high-voltage power tower environment and the telephone network copper facility. Figure 1. TFR T1 Fiber Repeater (TFR) A T1 office repeater in the Central Office (CO) provides 60 ma of simplex line current to the TFR fiber repeater Loopback can be activated and deactivated from either direction of transmission. Front panel LEDs provide visual indications of power, signal and loopback status For purposes of describing maintenance and diagnostic requirements on the transmission link, the metallic (facility) side of the TFR will be referred to as the CO side and the fiber side of the TFR will be referred to as the CPE side. The CO interface is via T1 cut-thru cards installed in slot positions 1, 3,, or. 1.4 Product Mounting Location The TFR is a 400-mechanics-type fiber repeater which mounts in slot positions 2, 4, 6, or 8 of a Westell CellPak CP0HINT (Intermediate) plug-in module shelf assembly (Figure 4). 1. Features The TFR contains the following features. Side 1 Automatic Line Build Out (ALBO) for T1 signal regeneration Copyright 2009 Westell, Inc. All rights reserved. * CLEI is a trademark of Telcordia Technologies. CellPak and Westell are registered trademarks of Westell, Inc. 0906I1RB Page 1 of 12

2 Section TFR--201 Up to 20 switch-selectable repeater addresses Lightning and AC power surge protection to GR CORE Fully temperature hardened, -40 to +6C (-40 to +10F) Power (PWR) and arming/loopback (ARM/LPBK) LEDs indicate power, arming and loopback status Span powered through the T1 simplex loop Enhanced remote maintenance/testing capabilities Security with built-in arming code capability Signal loopback toward the CO provides test of all functional components Signal loopback toward the customer premises Loopback Query feature identifies a TFR that is in loopback mode Loopback Indication Signal (LIS) when unit is in a Loopback mode Loopback timeout (30-minute) with remote disable Automatic SF (D4) or ESF code detection Compatible with AMI or B8ZS line coding Bit error acknowledgment which uniquely identifies the TFR as it is used in the CP0 application Front panel pin jacks for measuring span current 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 the original static-protective packaging from Westell. 2. APPLICATIONS 2.1 Loopback Feature The TFR provides maintenance loopback of the T1 signal. Loopback facilitates testing and troubleshooting of a suspected T1 span to a particular location. 2.2 T1 Span Line Considerations The TFR operates on 60 ma nominal simplex current from the T1 span and has a voltage drop of 20 volts. This voltage requirement should be considered when designing the T1 span for this application. DS1 RCV CO Side DS1 XMT DS1 RCV CO Side DS1 XMT Regen. LIS TFR Loopback to CO LIS Regen. TFR Loopback to CPE Figure 2. TFR Signal Loopback 3. CIRCUIT DESCRIPTION Fiber XMT CPE Side Fiber RCV Fiber XMT CPE Side Fiber RCV Refer to Figure 3 for a block diagram of the TFR T1 Fiber Repeater (TFR) circuit functionality. 3.1 Signal Transmission The bidirectional extended range Automatic Line Build-out (ALBO) circuit regenerates T1 transmission in the Side 1 transmission path. The regenerator circuit can operate with a T1 signal that has experienced from 0 to 3 db of cable loss Transmission From the CO (Side 1) Incoming bipolar signals from the CO are passed to the TFR s DS1 RCV port of pins and 13 (Side 1). These signal are transformer-coupled to the receive circuitry. The receive circuitry is equipped with an ALBO network which regenerates the incoming signal by automatically compensating for the effects of cable loss. From the receive circuitry, the signal is applied to a loopback detector circuit which monitors the incoming signal for loopback and maintenance control codes. The incoming signal is then applied to code detector and data encoder circuitry which prepares the DS1 signal for transmission over fiber. At the TFR s Fiber XMT port, an edge-emitting LED transmitter is used to transit the signal over single mode fiber to the FNI in the CP0RMT (Remote) enclosure Transmission From the CPE (Side 2) From the CP0RMT remote unit s FNI module, single mode fiber transmission of the DS1 signal is applied to a PIN diode receiver at the Fiber RCV port of the TFR. Clock recovery, decoding and code detection circuitry are used to convert the signal back to digital T1 format. The signal is applied to the controller which provides loopback detection functions. The signal is then applied to transmit circuitry which provides impedance matching and signal level adjustment to the transformer-coupled DS1 XMT port of the TFR (pins 41, 4). 3.2 Power Operation Line power for the module is derived from an Intelligent Office Repeater (IOR) typically located in a Central Office (CO). 60 ma line I1RB

3 Section TFR--201 DS1 RCV 13 (Tip) (Ring) T1 REGEN + Data Clock Data + Data T1 DATA Clock AND CODE DETECTOR Data DATA ENCODER FIBER TRANSCEIVER XMT ST to FC Adapter ST Fiber XMT SURGE PROTECTION S CO SIDE 10 Ohm POWER SUPPLY VDC + Span Current J300 +VDC PWR LPBK CONTROLLER Loopback Path ADDRESS SELECT S203 SLOT ID ID Common Slot ID 0 Slot ID 1 Slot ID CPE SIDE CPE LOS CHASSIS GROUND 2 SURGE PROTECTION CO LOS POWER GROUND 1 DS1 XMT 41 4 (Tip) (Ring) T1 DRIVER + Data Data + Data FIBER DATA Clock AND CODE DETECTOR Data DATA DECODER, CLOCK RECOVERY FIBER TRANSCEIVER RCV ST to FC Adapter ST Fiber RCV Figure 3. TFR Block Diagram current from the IOR is simplexed onto the transmission cable loops. These outside plant cable loops connect to the TFR at the far end of the loop. The TFR receives both power and transmission signals over these loops. The TFR is located in an Intermediate CP0 (CP0HINT) enclosure. The CP0 shelf backplane extends these loops to the plug-in slot for the TFR, via pins, 13, 41, and 4. This module draws DC power from the T1 simplex span. 4. OPTIONS & PHYSICAL FEATURES The TFR Intelligent Line Repeater (TFR) contains switches on the Printed Circuit Board (PCB) side panel assembly and LEDs on the front panel to provision the unit for proper operation and for testing and maintenance purposes. These items are shown in Figure 6 and are described below. 4.1 PCB Side Panel Features S203 and S204 The S204 2-position slide switch and the S position rotary switch are used together to select or provision the repeater address in the span. If the repeater is one of the first 10 repeaters in the span, set slide switch S204 to the 1-10 position. Then, to specify the exact repeater address within the group, use rotary switch S203. Note that if it is desired to set the repeater address to a number between 11 and 20, S204 must be in the position, and the number 10 must be added to the number set by rotary switch S and Fiber Cable Connectors These optical ST or FC cable connectors are used to terminate the transmit and receive fiber pairs to/from the FNI6 in the CP0RMT unit. Refer to Figure for cable installation. 4.2 Front Panel Features Located on the unit s front panel are four LEDs and two pin jacks (Figure 6). These features are described below PWR LED The green PWR (power) LED indicates the power status. See Figure 6 for the location and description of this LED LPBK LED The yellow LPBK (arming/loopback) LED indicates the loopback status, the arming state, or a remote change in the address setting. See Figure 6 for the location and description of this LED. 0906I1RB 3

4 Section TFR CO LOS LED The red CO LOS (Central Office Loss-Of-Signal) LED indicates a loss of signal from the CO (Side 1) of the T1 transmission. See Figure 6 for the location and description of this LED CPE LOS LED The red CPE LOS (Customer Premises Equipment) LED indicates a loss of signal from the CPE (Side 2) of the T1 transmission. See Figure 6 for the location and description of this LED Span Current Pin Jacks Two pin jacks (+ and -) are provided on the front panel for maintenance and testing purposes. Voltage will actually be measured across a 10 Ohm resistor to determine if the span current is at 60 ma ±3 ma. See Figure 6 for the location and a description of these jacks.. INSTALLATION The TFR should be installed according to local company practices. If none exist, the unit may be installed as described in this INSTAL- LATION part. No tools are required to install the TFR..1 Inspecting the Module If not previously inspected at the time of delivery, visually inspect the unit for damages prior to installation. If the unit has been damaged in transit, immediately report the damage to the transportation company and to Westell (see Part 8 for telephone number). Connector/Pin Function Transmit () Fiber XMT to CPE Receive () Fiber RCV from CPE DS1 RCV (Tip) 13 DS1 RCV (Ring) 1 Power Return Ground 2 Chassis Ground 41 DS1 XMT (Tip) 4 DS1 XMT (Ring) 0 Slot ID-2 2 Slot ID-1 4 Slot ID-0 6 Slot ID Common Table 1. TFR Connector/Pin Assignments CP0HINT Isometric View, Door Open Plug-in Module Mounting Shelf Assembly Cut Thru Circuit 1 Circuit 2 Circuit 3 Circuit 4 T F R 6 Cut Thru T F R 6 Cut Thru T F R 6 Cut Thru T F R 6 - CAUTION - Use care when installing and removing units - do not force a unit into place. If a unit resists insertion, remove it and check for debris in or near the shelf s connector and mounting slots. The unit may then be gently re-inserted..2 Installing the TFR Module After optioning the TFR for the proper application and operation, it can be installed in the Westell CP0HINT plug-in module mounting shelf assembly. Pin number assignments for the repeater are given in Table 1. Figure 4 shows the slot positions where the TFR should be installed (slots 2, 4, 6, and 8). See Figure for inside fiber connection and routing. - 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. 6. REMOTE MAINTENANCE OPERATION 400-Type 200 MECHANICS 400-Type 200 MECHANICS 400-Type 200 MECHANICS 400-Type 200 MECHANICS Figure 4. Installing the TFR in CellPak CP0HINT After the TFR has been properly optioned and installed, it can be remotely controlled for maintenance operations and status queries. Refer to Table 4 (Maintenance and Control Codes for the TFR) and the following paragraphs for a description of remote maintenance and control capabilities of the TFR I1RB

5 Section TFR--201 TFR Side View, Showing Fiber Connections 1. Connect fiber cable pigtails" with ST connectors (furnished) to and jacks on the TFR Printed Circuit Board (PCB). 2. Route fiber cables through the slot/hole in the front panel, being careful to maintain a safe fiber cable bend radius. 3. Route fiber cables upwards to fiber management bracket and then to fiber take-up reel, ending at the fiber splice tray. OSP Fiber Cable (One Cable Shown for Clarity Routes Counter-clockwise Around Take-up Reel Fiber Management Bracket Single-Strand Jacketed Fiber Cable Inside Fiber Pair (One Cable Shown for clarity) Routes Clockwise Around Take-up Reel CP0HINT Plug-in Module Shelf Assembly and Take-up Reel Take-up Reel under Fiber Splice Tray OSP Fiber Cable Inside Fiber Pair Enclosure walls removed for visual clarity Figure. Installing Wiring in CP0HINT - NOTE - Codes are transmitted LEFT-most-bit first,except for the ESF Data Link codes, which are transmitted RIGHT-most-bit first. 6.1 Arming the Span Repeaters Before remote maintenance testing can be performed, the TFRs must be armed to accept further control codes. The TFR can be armed from either the CO side or the CPE side. Arming is a TFR state accomplished by transmitting inband -bit code or a 16-bit data link code Arming - From The CO Side INBAND ARM code = > seconds ESF DL ARM code = > 16 ms. The TFR is armed from the CO side by sending the Inband Arming code (framed or unframed) for greater than seconds, or by 0906I1RB

6 Section TFR--201 sending the 16-bit ESF Data Link Arming code ( ) for greater than 4 repetitions. When armed, the front-panel yellow LPBK LED on the TFR flashes. The TFR will remain armed for 2 hours, unless the All Loopdown and Disarm code is received Arming from the CPE ARM code = > seconds ESF DL Arm Code = > 16 ms. The TFR is armed from the CPE by sending the Inband Arming code (framed or unframed) for greater than seconds. When armed, the front-panel yellow LPBK LED flashes. The TFRs will remain armed for 2 hours, unless the ALL LOOPDOWN and Disarm code (Paragraph 6.4.2) is received. 6.2 Repeater Addressing A TFR can be provisioned for a specific repeater address or location in a span line. There are two ways to program a TFR, locally by physically moving the switches (hard-setting), or remotely by sending a code in a signal (soft-setting). All repeater address codes are shown in Table Local Repeater Addressing (Hard Setting) A TFR can be physically provisioned (hard set), using the S203 side-panel-mounted rotary switch and the S204 slide switch, for one of 20 unique, 16-bit, address codes. These address codes become a unique loopback activate code for a specific TFR optioned for the specified address code Remote Repeater Addressing (Soft Setting) A TFR can be remotely provisioned with one of 20 unique, 16-bit address codes, using a test set, regardless of the settings of S203 and S204 on the side panel. There are two methods to remotely provision a TFR s loopback address: sequential addressing and random addressing. Sequential addressing automatically programs the ILRs and TFR in a particular span in a sequential order. Random addressing allows the tester to randomly address each ILR and TFR in a span, in no particular order. - NOTE - Remotely programmed addresses are stored in nonvolatile memory and will not be affected by a power failure Sequential Addressing Activated from: CO - Span Line Armed Activation code: To sequentially address up to 20 repeaters (ILR or TFR) from the CO location, do the following: 1. First, arm the span as described in Paragraph Next, send the sequential address code (6D Hex) continuously until all repeaters are programmed (20 seconds per repeater). The tester will receive the following address acknowledgment from each repeater programmed: 3 seconds of pattern sync 2 seconds of unframed all ones (AIS) seconds of pattern sync (first repeater enters loopback) 10 bit errors indicating first repeater has been programmed for address #1 First repeater exits loopback This sequential address programming and acknowledgment is repeated for each ILR and TFR in the span line Random Addressing Activated from: CO - Span Line Armed Activation code: > sec. 16 bit ILR address > 10 sec. To randomly address up to 20 repeaters, when intelligent repeaters are not placed in consecutive repeater housings, perform the following procedure: 1. First, arm the span as described in Paragraph Next, send the random address code (6DB Hex) for greater than seconds. 3. Remove the random addressing code, each repeater in the span line enter loopback. 4. Transmit, for greater than 10 seconds, the 16-bit loopback address code desired for the first repeater in the span line. After 10 seconds, the tester should receive the following response from the first repeater, verifying the address has been programmed: 16-bit address code injected with bit errors equal to 10 times the address programmed (i.e., if the first repeater in the span is programmed for the #4 address, the repeater will return 40 bit errors). The bit error response on subsequent queries will be. Bit errors are repeated every 20 seconds until the loopback address code is removed 6. After verifying that the first repeater has been programmed correctly, remove the address code. The repeater exits loopback.. Repeat steps 4,, and 6 until all ILRs and TFR in the span line are programmed Remote Address Reset Activated from: CO - Span Line Armed Activation code: > sec. To reset all remotely addressed repeaters to the hard-settings (addresses programmed on the side-panel switches), perform the following procedure. 1. First, arm the span as described in Paragraph Next, send the address reset code (FF Hex) for greater than seconds. 3. After seconds, all repeaters in the span line revert to their switch programmed addresses Changing Repeater Address Activated from: CO - repeater LPBK activated Activation code: > sec. 16-bit code for new address > sec. This feature allows a tester to change the currently programmed address of an ILR or TFR. To activate this feature, the ILR or TFR I1RB

7 Section TFR--201 loopback must be activated. After activating loopback and receiving the loopback acknowledgment (bit errors), transmit the Change Address code (6DF hex) for greater than seconds. The ILR or TFR will return the current bit error address. The tester then transmits the 16-bit loopback activated code for the new address. The repeater will confirm the address change seconds later by returning bit-errors equal to 10 times the new address. Example, if the address of the repeater is being changed from #2 to #3, the #2 repeater in loopback, upon receiving the Change Address code will return 20 bit errors. The tester then transmits the #3 address code (C43 hex) for greater than seconds. The repeater will confirm the address change by responding with 30 bit errors. 6.3 Loopback Loopback is a TFR state or mode of operation whereby test codes or signals, which are generated and transmitted from one end of a span line, are received and acknowledged by the TFR and sent back to the original transmitting end, thus creating a signal loop. Performing loopback queries on each device in the span line allows the tester to rapidly sectionalize or isolate a problem in the span line. After a TFR has been armed, it will respond to its unique loopback code. After receiving the loopback activate code for greater than seconds, a TFR s loopback is activated toward the direction of code transmission. Loopback can be activated from either the CO or from the CPE. When loopback is activated from the CO for the first time, the TFR provides a signal loopback. When loopback is activated from the CPE, the TFR provides a signal loopback internally within the repeater circuitry. - NOTE - The span remains powered during loopback Bit Error Acknowledgment Bit-error Acknowledgment is the response method used by the TFR to verify that the unit has entered loopback or has successfully completed any of the other remotely-accessible features. The TFR injects logic errors into the looped-back T1 bit stream. The logic errors are repeated every 20 seconds until the loopback activate or other maintenance codes are removed Loopback Acknowledgment Sequences The TFR has two different loopback acknowledgment sequences (Loopback #1 and #2). Each sequence responds differently through bit error transmission, depending on whether the activation code is sent once or resent a second time. When a TFR receives a loopback activate code, after 3 seconds the following Loopback Acknowledgment Sequence is transmitted by the TFR. Two seconds of all ones TFR enters loopback, returns loopback activate code for seconds. TFR injects bit error acknowledgment Loopback #1 (First Activation) Activated from: CO or CPE, TFR Armed Activation code: > sec. Acknowledgment: Bit Error = (see Table 4) When the unit is armed, logic loopback can be activated, from the CO or CPE side, by sending the 16-bit loopback activation code. After receiving the loopback activation code for greater than seconds, the repeater enters Loopback and returns Bit Error Acknowledgment toward the activating side. The TFR will remain in loopback until the 30 minute loopback timeout period expires or the loopback is remotely deactivated Loopback #2 (Second Activation) Activated from: CO, TFR in loopback #1, TFR armed Activation code: > sec. Acknowledgment: Bit Error = When the unit is armed and when the loopback activation code is sent a second time, the TFR will return a Bit Error Acknowledgment of, to uniquely identify itself in the T1 span as the CP0 application. The TFR will remain in loopback until the 30 minute loopback timeout period expires or the loopback is remotely deactivated Loopback Indication Signal (LIS) When the TFR is put in Loopback mode from the CO, the TFR transmits an unframed, all ones, Loopback Indication Signal (LIS) toward the CPE side. When the TFR is put in loopback mode from the CPE side, LIS is sent toward the CO side Loopback Time-out Disable Activated from: CO or CPE, Loopback Activated Activation code: > seconds Bit Error Response (1st Activation) = Bit Error Response (Subsequent Activations) = Testing of a TFR may exceed the 30-minute loopback time-out. To disable the loopback time-out, from the CO or CPE locations, place the desired TFR into loopback. After receiving Loopback Acknowledgment, transmit the Loopback Time-out Disable Code (DD6 Hex) for greater than seconds. The TFR will respond with its Bit Error Acknowledgment. The TFR will remain in loopback until loopback is deactivated or the unit is power-cycled. The TFR will revert to the 30-minute loopback time-out each time loopback is re-activated. 6.4 Deactivating Loopback (Loopdown) To cancel or deactivate loopback, one of two commands can be sent to the TFR in loopback. The command used depends upon the original loopback-activation direction (CPE side or CO side), the current direction of the tester desiring the deactivation, and whether or not the armed state is desired. These commands are: Repeater Loopdown All Loopdown and Disarm 0906I1RB

8 Section TFR Loopdown Deactivation Activated from: Loopback direction Activation code: > seconds This feature allows a tester on one side of a span line to deactivate or loop down a TFR in loopback mode which was activated from the same side. The TFR remains armed. Use this command to deactivate loopback before the 30-minute loopback time-out period by sending the 16-bit loopback deactivate (TFR LPDN) code for greater than seconds. The TFR remains armed after loopback deactivation. Each time a TFR returns to the armed state, the 2-hour arming timer resets. The tester can either activate loopback to test another TFR or can re-activate the same TFR. If further testing is not required, the tester can deactivate loopback and disarm the span line by sending the Loopdown and Disarm code All Loopdown And Disarm Activated from: Loopback direction Activation code: INBAND: > sec. from CO or CPE ESF DL: > 16 ms. from CO This feature deactivates loopback and disarms the span line (returns the circuit to normal). The 16-bit ESF Data Link All Loopdown and Disarm command code ( ) can be sent only from the CO side (code must be detected for a minimum of four repetitions). The Inband All Loopdown and Disarm command code (11100 for a minimum of seconds) can be sent from either the CO or CPE side of the span line. - NOTE - CPE side initiated TFR loopback can be deactivated and disarmed from the CO or CPE locations. 6. Span Line Status Queries 6..1 Loopback Query Activated from: CO or CPE, TFR in loopback Activation code: > seconds Bit Error Acknowledgment: (See Table 4) The T1 span can be queried, from the CO or the CPE, to determine if the TFR is in loopback. The side requesting the query sends the 16-bit loopback query code (DD Hex) Auto Query Activated from: CO or CPE - Loopback Activated Activation code: > 1 sec. Auto Query will activate loopback, return the loopback acknowledgment (bit errors), and then deactivate loopback, on each armed repeater, in succession Issue Query Activated from: CO or CPE - Loopback Activated Activation code: > sec. Issue Query allows the tester to determine the issue number and product type of the TFR in loopback. The tester sends the 16-bit issue query code (6B hex) for greater than seconds. The TFR in loopback responds by injecting bit errors into the looped T1 bit stream. The total number of bit errors injected is a 3-digit number, in the format of X0, where designates the product type as a TFR, and X equals the issue number of the product Slot ID Query Activated from: CO or CPE - Loopback Activated Activation code: > sec. Bit Error Acknowledgment: Bit Error = 1X0, where X is slot number The TFR has the ability to identify the slot it is plugged into if it is installed in the Westell CP0RMT plug-in mounting. The slot number is used in the bit error acknowledgement to aid in defining the modules location. To query the TFR for its installed slot number, the inband Slot Identification Query code ( , C64 hex) must be sent sent to the TFR for greater than seconds while the module is in loopback. The bit error response is 1x0 bit errors, where x is the numeric value of the slot number. For example, a bit error response of 120 indicates slot number 2. If the bit error acknowledgment is 100, the TFR is installed in a mounting where slot identification is not available. The bit errors are repeated every 20 seconds for as long as the Slot ID Query code is sent.. TESTING & TROUBLESHOOTING.1 Testing These testing 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. The procedure is intended to ascertain proper operation of the span, and if problems should occur, to isolate those problems to the most probable area..1.1 End-to-End Test After installation is complete, an end-to-end test should be performed according to local practice to verify circuit operation..1.2 Maintenance and Control Codes Test If the end-to-end test succeeds, units in the span can be further tested or maintained by using the maintenance and control codes listed in Table 4..2 Troubleshooting If trouble is encountered, verify all connections and switch settings (on the office repeater and the TFR), and verify the TFR is making I1RB

9 Section TFR--201 a positive connection with the assembly connector. If trouble persists, replace TFR and repeat procedures outlined. 8. CUSTOMER SERVICE If technical or customer assistance is required, contact Westell by calling or using one of the following options: Voice: (800) global_support@westell.com For additional information about Westell, visit the Westell World Wide Web site at 9. WARRANTY & REPAIRS 9.1 Warranty Westell warrants this product to be free of defects at the time of shipment. Westell also warrants this product to be fully functional for the time period specified by the terms and conditions governing the sale of the product. Any attempt to repair or modify the equipment by anyone other than an authorized Westell representative will void the warranty. 9.2 Repair and Return Westell will repair or 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. Once an RMA number is obtained, return the defective unit (freight prepaid), along with a brief problem description, to the address we will provide to you when you contact us. Voice: (630) rgmdept@westell.com 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. 10. SPECIFICATIONS 10.1 Electrical Specifications Transmission A. Line Impedance: 100 Ohms (±20 Ohms) at 2 khz B. Automatic Line Build-Out: 0 to 3 db line loss at 2 khz Signal C. Line Rate: 1.44 Mb/s (±200 b/s) D. Line Signal: Bipolar, return-to-zero E. Pulse Height: 2.4 V to 3.0 V F. Line Signal Pulse Width: 324 nsec. (±30 nsec.) G. Line Pulse Width (Unbalance from Negative to Positive Pulse): 1 nsec., max. H. Line Signal Pulse Overshoot: 10 to 30% of pulse height I. Timing (between pulses): 648 n sec. (±1 nsec.) J. Pulse Shape: Provides pulse shaping in accordance with AT&T compatibility Bulletin 113 specifications Power K. DC Line Current: 60 ma (±3 ma) L. DC Voltage Drop: 20 VDC at 60 ma (nominal) Optical M. Line Bit Rate: 1.44 Mb/s nominal N. Fiber Mode: Single Mode 9/12 μm O. Optical Source: Edge-emitting LED P. Optical Detector: PIN Diode Q. Optical Power: -29 dbm R. Optical Sensitivity: -36 dbm S. Optical Connector: ST (FC adapter) T. Center Wavelength: 1300 ŋm U. Total System Margin: db max Ordering Specifications To order units, call the telephone number shown in Part 8 please specify a specific model number shown in Table I1RB 9

10 Section TFR--201 Model # TFR CP0HINT enclosure CP0RMT enclosure HFR6 FNI6 A C Description T1 Fiber Repeater, mounts in a CellPak CP0HINT enclosure in T1 configuration. CLEI* Code: NCRPB0AAAA; Barcode/ECI: 24668; CPR: P249. CellPak Intermediate Fiber DS1 Transport System for High- Voltage Installations. CLEI* Code: NCM49B0DRA; Barcode/ECI: ; CPR: CellPak CP0RMT Remote Fiber DS1 Transport System for High-Voltage Installations. CLEI Code: NCM4YBSBRA; Barcode/ECI: ; CPR: N062 HDSL Fiber Repeater, 400 mechanics, mounts in a CellPak CP0HINT enclosure in HDSL configurations. CLEI* Code: NCRPAAAAAA. Barcode: CPR: M2810. Fiber Network Interface, mounts in CellPak CP0RMT enclosure. CLEI* Code: NCD2Z8CBAA; Barcode/ECI: 24816; CPR: M MECHANICS Cut-Thru Card. CLEI* Code: DMPQOBLFAA; Barcode/ECI: 2028; CPR: S MECHANICS Cut-Thru card, DS1, w/front panel jacks for test access. 261 Power Supply (temperature-hardened, 48 VDC, 2.0 A) /16" Special Pin-in-hex Allen Wrench. *CLEI is a trademark of Telcordia Technologies. Table 2. Ordering and Option Information 10.3 Physical Specifications The physical specifications are shown in Table 3. Physical Feature U.S. Metric Height.6 in cm Width 1.4 in. 3.6 cm Depth.9 in. 1 cm Weight (approx.) 12 oz. 340 g Operating Temp. -40 to 149 F -40 to 6 C Humidity Mounting 0 to 9% (non-condensing) Positions 2, 4, 6 and 8 of the Westell CellPak CP0HINT plug-in module shelf Table 3. Physical Specifications 11. ACRONYMS & ABBREVIATIONS ALBO - Automatic Line Build Out AMI - Alternate Mark Inversion B8ZS - Bi-polar 8 Zero Substitution cm - centimeter CO - Central Office CP - CellPak CPE - Customer Premises (or Provided) Equipment ESF - Extended Super Frame ESF DL - ESF Data Link FNI - Fiber Network Interface ILR - Intelligent Line Repeater INT - Intermediate IOR - Intelligent T1 Office Repeater LED - Light Emitting Diode LIS - Loopback Indication Signal LOS - Loss-Of-Signal LPBK - Loopback ma - Milliampere(s) Mb/s - Megabits per second PCB - Printed Circuit Board PWR - Power R - Ring RCV - Receive RMA - Return Materials Authorization RMT - Remote T - Tip TFR - T1 Fiber Repeater V - Volt(s) VAC - Volts Alternating Current VDC - Volts Direct Current XMT - Transmit I1RB

11 Section TFR--201 Front View Side View PWR LPBK CO LOS CPE T F R S ADDRESS S203 + SPAN CURRENT - Westell Option Position/Label Function/Description PWR LED (green) Lights when span power is applied to TFR. Side Panel Front Panel LEDs Pin Jacks S204 S203 Fiber Strand Jacks LPBK LED (yellow) CO LOS CPE LOS (red) (red) + SPAN CURRENT - SPAN CURRENT On steady for loopback. Flashes (1/8 second intervals) when module is armed. Pulses (1-second intervals) when TFR is remotely programmed (soft-set) to an address other than address set by the physical switches (hard-set). To cancel or clear the soft-setting, change the physical switch to the desired address and power cycle the TFR. Off indicates no loopback, not armed, and address equals physical switch setting. Lights when Loss-Of-Signal (LOS) is detected from Network/Facility. On steady when LOS is detected from CPE/Cust. Interface. Used to measure span current (voltmeter should be used to measure a range of 0. VDC to 0.63 VDC) Identifies/designates repeater as one of the first 10 repeaters in the span Identifies/designates repeater as one of the second 10 repeaters in the span. 1 through 10 Sets the repeater address to the number set by this rotary switch. If S204 is set to 11-20, add 10 to the number selected by this rotary switch. Terminates receive fiber from FNI6 (CPE). Terminates transmit fiber to FNI6 (CPE). Figure 6. Locations and Descriptions of the TFR Options and Features 0906I1RB 11

12 Section TFR--201 To Perform This Function or Command Arm the TFR from the CO Arm the TFR from the CPE Address Reset (From CO Only) Remote Sequential Addressing (From CO Only) Remote Random Addressing (From CO Only) (ILR, TFR) Change Address (From CO Only) Sequential Loopback (ILR, TFR) Loopback Time-out Disable Enter/Send Code This Code Hex Value For This Long (Time Duration) Results/Action Taken/Notes > sec. LPBK LED flashes to indicate the armed state. TFR remains armed for 2 hours or until a loopdown/disarm command is received (ESF Data Link) 12FF > 16 msec LPBK LED flashes to indicate the armed state. TFR remains armed for 2 hours or until a loopdown/disarm command is received > sec. LPBK LED flashes to indicate the armed state. TFR remains armed for 2 hours or until a loopdown/disarm command is received FF > sec. Resets armed repeaters to address on switches D > 10 sec. per repeater Armed TFRs activate loopback, send sequential address code from the source, bit error acknowledgment is returned, each repeater deactivates loopback and rearms DB > sec. Armed repeaters enter loopback upon removing the Remote Random Address code. Send desired 16-bit loopback activate code (> 10 sec) to program the first repeater from source. After 10 sec., first repeater programs its address and returns bit errors corresponding to the programmed address. Repeat for all repeaters DF > 10 sec. Loopbacked repeater receiving Address Change code returns its current bit error address. Transmit the 16-bit code for new address; repeater responds with loopback acknowledgment for new address FB > sec. First armed repeater from source activates loopback & returns its bit error address. Resend Sequential Loopback code; 1st repeater loops down & next repeater will enter loopback & return its LPBK acknowledgment DD6 > sec. Disable the 30-min. loopback time-out for the loopbacked repeater receiving the Disable Loopback Time-Out code, then respond with a Bit Error Acknowledgement (errors). Loopback Query DD > sec. First looped back repeater responds with seconds of Loopback Query code followed by Bit Error Acknowledgement (logic errors). Auto Query BB > 1 sec. Each armed repeater, in succession, activates its loopback, returns its Loopback Acknowledgment (bit errors), and deactivates loopback. Issue Query B > sec. A 3-digit number (total # of bit errors injected into the looped T1 bit stream), in the format of X0, is returned by the looped back repeater, where indicates a TFR repeater and X indicates the issue #. Slot ID Query C64 > sec. A 3-digit number (total # of bit errors injected into the looped T1 bit stream), in the format of 1X0, is returned by the looped back repeater, where 1 indicates a TFR repeater and X indicates the numeric value of the slot #. Repeater Loopdown All Loopdown and Disarm Repeater Address Address 1 Address 2 Address 3 Address 4 Address Address 6 Address Address 8 Address 9 Address 10 Address 11 Address 12 Address 13 Address 14 Address 1 Address 16 Address 1 Address 18 Address 19 Address > sec. Loops down (but not disarms) repeater in loopback mode. Transmit code for more than sec. per device sec. per TFR&FNI (ESF Data Link) FF C41 C42 C43 C44 C4 C46 C4 C48 C49 C4A C4B C4C C4D C4E C4F C0 C1 C2 C3 C4 4 reps per TFR&FNI > sec. Loops down (and disarms) the FNI and repeater currently in loopback after receiving this code. Loops down (and disarms) the FNI and repeater currently in loopback after receiving this code from the DS1/CO side. Signal Loopback at repeater 1. Bit Error Acknowledgment = 10 Signal Loopback at repeater 2. Bit Error Acknowledgment = 20 Signal Loopback at repeater 3. Bit Error Acknowledgment = 30 Signal Loopback at repeater 4. Bit Error Acknowledgment = 40 Signal Loopback at repeater. Bit Error Acknowledgment = 0 Signal Loopback at repeater 6. Bit Error Acknowledgment = 60 Signal Loopback at repeater. Bit Error Acknowledgment = 0 Signal Loopback at repeater 8. Bit Error Acknowledgment = 80 Signal Loopback at repeater 9. Bit Error Acknowledgment = 90 Signal Loopback at repeater 10. Bit Error Acknowledgment = 100 Signal Loopback at repeater 11. Bit Error Acknowledgment = 110 Signal Loopback at repeater 12. Bit Error Acknowledgment = 120 Signal Loopback at repeater 13. Bit Error Acknowledgment = 130 Signal Loopback at repeater 14. Bit Error Acknowledgment = 140 Signal Loopback at repeater 1. Bit Error Acknowledgment = 10 Signal Loopback at repeater 16. Bit Error Acknowledgment = 160 Signal Loopback at repeater 16. Bit Error Acknowledgment = 10 Signal Loopback at repeater 18. Bit Error Acknowledgment = 180 Signal Loopback at repeater 19. Bit Error Acknowledgment = 190 Signal Loopback at repeater 20. Bit Error Acknowledgment = 200 Table 4. Maintenance and Control Codes for TFR Repeaters I1RB