Installing the Fiber Optics Card

Transcription

1 R Installing the Fiber Optics Card The Rising Star TM Understanding the Fiber Optics Card The Fiber Optics card provides an optical interconnection between the main and expansion cabinets in an expanded FX system. With the benefit of the fiber optic medium s immunity to signal degradation or corruption, it provides a good alternative to the SCSI-driven electrical link used for the same purpose. The Optics card installs in the FX system in the same locations that accept the SCSI card option. While it is not likely that you will ever need to remove a SCSI card and replace it with a Fiber Optics card, this action is possible. If you do this, you will need to enable the system software key and install the FXS or FXT 464 system software build in the system that you are converting. Fiber Optics support is system software keyed, and you must enable the software key before you can turn on Fiber Optics service at an installation site. The system software key provides for two different levels of support for FX fiber systems the FXS and FXT Fiber 224 platforms that allows 14 universal board slots and the FXS and FXT Fiber 464 platforms that allows 29 universal board slots. This slot limit applies to the boards that you configure through VMMI and does not include such items as the CPU board. FXS Fiber systems use the same board layout as do the conventional FXS 464 systems, and the FXT fiber systems use the same board layout as do the conventional FXT 464 systems. Two important considerations are as follows: you must insure that the FXS or FXT 464 software file is loaded in any FX system that you arrange to have a Fiber Optics interface. The system software key that enables the Fiber 224 or Fiber 464 systems will only work with Software Release 180 or later system software. The FXINT-MAUX board must be at revision D or later. This manual has been developed by Comdial Corporation (the Company ) and is intended for the use of its customers and service personnel. The information in this manual is subject to change without notice. While every effort has been made to eliminate errors, the Company disclaims liability for any difficulties arising from the interpretation of the information contained herein. The information contained herein does not purport to cover all details or variations in equipment or to provide for every possible contingency to be met in connection with installation, operation, or maintenance. Should further information be desired, or should particular problems arise which are not covered sufficiently for the purchaser s purposes, contact Comdial, Inside Sales Department, Charlottesville, Virginia Printed in U.S.A. IMI /00

2 IMI Detailing The Fiber Optics Kits Systems normally do not ship from the Comdial factory with the Fiber Optics cards installed. The Fiber Optics card is part of a field expansion kit that includes both a main and expansion Fiber Optics card and an expansion services board. The Comdial ordering code numbers for the Fiber Optics expansion kits are as detailed in the following table: Kit Ordering Code FXOPX-1 FXOPX-2 Kit Contents (1) FXOPT-FBM-1 main Fiber Optics board (1) FXOPT-FBX-1 expansion Fiber Optics board (1) FXINT-FSRV expansion services board (board includes eight DTMF receivers for system use when needed) (1) FXOPT-FBM-1 main Fiber Optics board (1) FXOPT-FBX-1 expansion Fiber Optics board (1) FXINT-FSRV-1 expansion services board (board has no on-board DTMF receivers board is always used in the second expansion cabinet on FXS systems) Understanding Fiber Optic Principals Fiber Optics is a non-electronic method of communication and signal transfer that is quickly finding its way into a broad array of uses. The following paragraphs provide basic information about Fiber Optics signal transmission and its handling requirements. Describing Fiber Optics Basically, Fiber Optic communications consists of sending light pulse signals down strands of glass or plastic fiber that are as thin as a human hair. The light passes down the center core of the fiber being guided to do so by its reflection off the outside of the core. A cladding that surrounds the core provides the needed reflecting properties. The core and the cladding are made from very pure glass although some fibers are constructed from plastic and some have a glass core and plastic cladding. The fiber is coated with a plastic buffer that provides moisture and damage protection. The entire assembly is covered with a tough plastic jacket. There are two different types of fiber currently in use Multi-mode and single-mode. Multi-mode fiber has a bigger core, operates with LED light sources, and is used for local area networks. single-mode fiber has a smaller core, operates with laser light sources and is used for telephony and CATV applications. (The Fiber Optics card discussed in this publication uses the Multi-mode fiber.) Fiber optic signal transfer works as follows: At the transmission source, conditioning circuitry causes the electrical energy to control a laser or LED light source. Fiber optic cabling carries this signal-controlled light to a receiver destination where a photo diode and its associated circuitry converts the light back into electrical energy. The complete fiber optic link consists of two fibers transmitting in opposite directions to provide full-duplex communications. 2 Understanding the Fiber Optics Card

3 IMI The ability of Fiber Optics to successfully transmit data ultimately depends upon optical power at the receiver. Too much power saturates the receiver and too little power causes noise interference. The receiver power depends upon how much power the transmitter launches into the fiber optic cabling and the loss factors of the interconnecting cabling and its terminations. Discussing Signal Loss Fiber Optics cabling experiences signal loss as the light passes through it s length. This signal loss is expressed in decibels or db just as it is in electrical signal transfer. A -10dB loss means a reduction in light power of 10 times the original signal strength; -20dB means another 10 times reduction in strength or 100 times overall; -30dB means another 10 times reduction or a 1000 times loss overall. Multi-mode fiber losses are about 1 to 3 db per kilometer depending upon the wavelength of the light source. single-mode fiber losses are about.3 db per kilometer. Technicians measure loss with a light source and a power meter according to two Electrical Industries Association (EIA) standards FOTP 171 for short jumper cables and FOSTP-14 for installed cables. All loss tests require the technician to test the loss of an unknown cable mated to a known good cable. Optical power strength expression is in dbm (dbs referenced to one milliwatt of power). Optical power is an absolute measurement while loss is a reading that measures one power level relative to another. Listing the Regulating Standards The following industry standards regulate fiber optic applications: Electrical Industries Association (EIA) FOTP (Fiber Optics Test Procedures) and OFSTP (Optical Fiber System Test Procedures) US National Institute of Standards and Technology (NIST) standards for optical power measurements National Electrical Code for flammability of cables Handling Fiber Optic Cabling Fiber optic cabling requires unique handling requirements and special-purpose connectors for splicing and termination. The tools and techniques for handling fiber optic cabling and making the necessary connections require special knowledge and skill-set training. Obtaining Fiber Optic Training While the amount of information and skill-set training need to administer a Fiber Optics installation is beyond the scope of this card installation document, information and training is available from many sources. Comdial specialists in no way recommend any particular information source; however, there are many Internet WEB sites that provide useful information about fiber optic technology, which you can seek out using your WEB browser. One example of such a site is. Understanding the Fiber Optics Card 3

4 IMI Installing the Fiber Optic Card Using the information provided in this section as a guide, mount the main Fiber Optics card (FXOPT-FBM-1) on the main cabinet s auxiliary board (the FXINT-MAUX board), and mount the expansion Fiber Optics board (FXOPT-FBX-1) on the expansion services board (FXINT-FSRV or FXINT-FSRV-1). Install the board assemblies in the respective equipment cabinets. CAUTION Circuit boards for the FX system are susceptible to damage caused by electrostatic discharge, and you must keep this fact in mind as you handle the circuit boards. Refer to the Comdial publication IMI01-005, Handling Of Electrostatically Sensitive Components, for general information. Specific handling precautions are also included in this installation instruction. Understanding Basic Board Handling Precautions When removing or installing circuit boards in the equipment cabinet, you must install a static discharge wrist strap on your bare wrist, and adjust it for a snug fit. Be sure that the strap is touching bare skin and is not isolated by clothing. Connect the wrist strap cord between the wrist strap and an AC or earth ground. Unless a circuit board has a pre-charge port on its front panel, disconnect the AC power cord from the AC outlet and disconnect the cable between the cabinet and any external battery back-up assembly before you remove or install the circuit board. However, if the board does include a pre-charge port, you can connect a standard telephone handset cord between the pre-charge port on the circuit board and the pre-charge port on the power supply assembly (FXS) and remove or install the circuit board while the system is operating. On FXT systems, the pre-charge cord is pre-wired to the power supply and hangs between it and the circuit board cage. Whenever you remove a circuit board from the cabinet, immediately place the board in a static protection bag while you still have your wrist strap in place and properly grounded. Creating a Static-Safe Work Area When removing circuit boards from an installation location for servicing, always transport them to a static-safe work area in static protection bags. If you do not already have a static-safe work area, you can create one by arranging a work area as detailed in the illustration below. ESD Protective Mat ESD Protective Worksurface Static 2 Static Wrist Strap Common Point Ground Typical Earth Ground ESD Protective Mat 4 Installing the Fiber Optic Card

5 IMI Installing the Card You can place up to two FXOPT-FBM-1 cards (one for each expansion cabinet that the site requires) in the front two positions on the FXINT-MAUX auxiliary board and install that board assembly in the main equipment cabinet. Mount one FXOPT-FBX-1 card in the front position on the FXINT-FSRV or FXINT-FSRV-1 expansion services board and install that board assembly in the expansion cabinet. Mounting the Fiber Optics Card 1. Install your static discharge wrist strap on your bare wrist; adjust it for a snug fit. Be sure that the strap is touching bare skin and is not isolated by clothing. Connect the wrist strap cord between the wrist strap and an AC or earth ground NOTE: With the common equipment in the installed position, the ground lug on the back of the cabinet is an appropriate grounding point since it should have a heavy ground wire connected between it and a good earth ground. 2. Disconnect the AC power cord from the AC outlet and disconnect the optional battery back-up assembly from the cabinet power supplies. 3. Loosen the retaining hardware and remove the host board, which is to receive the Fiber Optics card, from the equipment cabinet, place it in a static protection bag, and transport the board to the static-safe work area. 4. At the static-safe work area, with your wrist strap in place, remove the host circuit boards and the Fiber Optics cards from their respective static protection bags. 5. Referring to the illustrations on page 7, orient the host circuit board and the Fiber Optics card, and attach them with the supplied hardware. Installing the Mounted Assembly 1. Place the host board and its newly installed Fiber Optics card into a static protection bag and transport this assembly back to the common equipment cabinet. 2. With your static strap on your wrist, remove the board assembly from the static protection bag and install the board in its designated board slot. See the board location illustration on page Make a final inspection to ensure that the board assembly is oriented correctly and mated properly. 4. Install and tighten the supplied screws to secure the circuit board assembly to the board cage. 5. Plug the AC line cord into the AC outlet, reconnect any battery back up equipment and switch on the power supply. Installing the Fiber Optic Card 5

6 IMI Power Supply Assembly Pre-charge Port Location Typical Circuit Board Pre-charge Port Location Universal Board Slots: UNIV 6, UNIV 5, UNIV 4, UNIV 3, UNIV 2, and UNIV 1 (Used for Line or Station Boards) Dedicated Services/CPU Board Slot Universal/Auxiliary Board Slot 7 (slot 7 will not function properly with circuit boards that require a synchronization (sync) card for operation. Typical boards that fall into this category include T1 and E1 boards) fulbox2.cdr Locating the Auxiliary Board (FXS shown, FXT similar) 6 Installing the Fiber Optic Card

7 IMI FXOPT-FBM-1 Location (two places) FXINT-MAUX FXOPT-FBX-1 Location (one place) Card Mounting Hardware MAUX_SVR.CDR FXINT-FSRV Installing the Fiber Optic Card 7

8 IMI Installation Restrictions for T1, E1, PRI, and Networked Locations You must insure that both the primary and secondary 8K clock reference signals originate from T1 boards located in the main cabinet. This restriction is necessary because the fiber optics link cannot transmit in a consistent manner any 8K clock reference signals that originate from T1 boards located in an expansion cabinet. Connecting the Fiber Optics Cards The fiber optic cards supports system operation in a campus environment. The operating specifications for this environment is as follows: minimum transmit power of -20dBm and a maximum receive sensitivity of -30dBm. Keep the maximum distance between the main and expansion cabinets to.9 miles (1.5km) or less. Maintaining this distance parameter holds the Optical Power Budget (OPB) for connector loss, splices, switches, and so forth to 6dBm or less. An OPB of 6dB or less results in a Bit Error Rate (BER) of or better. (The BER is a measure of transmission quality and means that only one bit out of 1,000,000,000,000 is in error.) Maintaining the specified distance parameters allows the Fiber Optics cards to operate properly to the campus environment specifications. Connect the FXOPT-FBM-1 and FXINT-FBX-1 cards together with Fiber Optics cabling that meets the following criteria: Fiber type Multi-mode Core/Cladding 6.25/12.5 microns (a micron is one-millionth of a meter) Wavelength 1300 nanometers (10-9 meters) Connector SC Duplex (per EIA 568 specifications) Jacketing Determined by site requirements The diagram on page 9 shows cabinet expansion using the Fiber Optics cards and cabling. SC Fiber Optic Connection (per EIA 568 Specification) Typical Fiber Optic Card Front Panel Locating the Connector Fiberconn.cdr 8 Connecting the Fiber Optics Cards

9 IMI Main Interface Fiber Optics Card (FXOPT-FBM-1) (Need one card for each expansion cabinet.) Expanding an FXS System Fiber Optics Cabling Pair Expansion Fiber Optics Card (FXOPT-FBX-1) Fiber Optics Cabling Pair Expansion Fiber Optics Card (FXOPT-FBX-1) Main Fiber Optics Card (FXOPT-FBM-1) Expanding an FXT System Fiber Optics Cabling Pair Expansion Fiber Optics Card (FXOPT-FBX-1) Expand_fiber.cdr Expanding the FX System Connecting the Fiber Optics Cards 9

10 IMI Programming for the Fiber Optics Card When you elect to create a new database, VMMI presents you with a dialog that lets you specify the data communications system for the new database that you plan to create. With FX systems, you may choose the optional fiber optics solution for linking the main and expansion cabinets together. If you make this selection, you must pick the FXS Fiber 224, FXT Fiber 224, FXS Fiber 464, or FXT Fiber 464 platform. The Fiber 224 platform accommodates the following configurations: one expansion cabinet for FXT systems or two expansion cabinets for FXS systems and 14 universal board slots. The Fiber 464 platform accommodates the following configurations: one expansion cabinet for FXT systems or two expansion cabinets for FXS systems and 29 universal board slots. Expansion interface capability via the Fiber Optics card requires that you enable the system software and install an FXS or FXT Fiber 224 or 464 software database in the system. In addition, you need to perform all necessary expansion cabinet programming. VMMI Fiber Optics Limitations To enforce the limit of 14 universal boards for the Fiber 224 platforms, the VMMI software follows the rules listed below: VMMI prevents you from selecting more than 14 boards through Board Configuration when you program a Fiber 224 database either online or offline. (To enforce this 14 board limit, the VMMI software counts any boards that you configure through VMMI. The software does not count boards (such as the CPU board) that are not configured through VMMI. VMMI allows you to only restore a Fiber 224 database to a Fiber 224 system. 10 Programming for the Fiber Optics Card

11 IMI Fiber Optics Database Translation The allowed database translations to and from the various fiber optic enabled platforms are shown in the following charts: For the allowed translations, the FXS Fiber and FXT Fiber platforms behave exactly as the equivalent standard FXS 464 or FXT 464 platforms. For translations between platforms with the same board layout, the software makes no changes to the board configuration. TRANSLATION TO FIBER PLATFORMS Source Destination FXS Fiber 224 FXS Fiber 464 FXT Fiber 224 FXT Fiber 464 FX 96-Port YES YES YES YES FXS 112 YES YES YES YES FXS 224 YES YES YES YES FXS 464 NO YES NO YES FXT 112 YES YES YES YES FXT 224 YES YES YES YES FXT 464 NO YES NO YES TRANSLATIONS BETWEEN FIBER PLATFORMS Source Destination FXS Fiber 224 FXS Fiber 464 FXT Fiber 224 FXT Fiber 464 FXS Fiber 224 YES YES YES YES FXS Fiber 464 NO YES NO YES FXT Fiber 224 YES YES YES YES FXT Fiber 464 NO YES NO YES Source FXS Fiber 224 FXS Fiber 464 FXT Fiber 224 FXT Fiber 464 TRANSLATIONS FROM FIBER PLATFORMS Destination FX FXS 112 FXS 224 FXS 464 FXT 112 FXT 224 FXT Port NO NO NO YES NO NO YES NO NO NO YES NO NO YES NO NO NO YES NO NO YES NO NO NO YES NO NO YES Programming for the Fiber Optics Card 11

12 IMI Testing the Fiber Optics Installation Functional testing of the FX expansion system is normally adequate to insure proper Fiber Optics card operation. In-depth testing and troubleshooting of a Fiber Optics installation requires that you have a training skill-set and a knowledge base that is beyond the scope of information provided by this publication. You must obtain this necessary expertise before you can successfully test a Fiber Optics installation. Further, to test and troubleshoot an installation, you need a Fiber Optics test kit, which includes a fiber optic power meter and an LED or laser light source; you need test cables that serve as transmit and receive jumpers for testing the network cabling; and you need a connector termination kit to interconnect the jumper cables with the network cabling. Detailing the Fiber Optics Card s Indicator Lights The Fiber Optics card provides two status indicators for your reference. LED Type Status Indication POWER ON Indicates that power is applied to the card and its microprocessor is operating OFF Card is not powered SIGNAL ON Received signal is functional OFF No received signal fiberled.cdr SIGNAL LED POWER LED Locating the Status Lights R Charlottesville, Virginia World Wide Web: