Comdial Dxp Plus Instructions Manual
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5.0 Testing The Analog Station Installation 5.1 Making A Resistance Check Make the following resistance measurements at the station connector blocks under the following conditions. ·AC power cord disconnected from electrical outlet. ·External battery back-up assembly disconnected. ·Common equipment connected to station connector blocks. ·Stations wired and wiring punched down on blocks. ·Bridging clips removed from blocks to isolate stations from common equipment. 1. Measure the resistance of each installed station and wiring from the station side of the connector blocks. Resistance values will vary with cable length and station type but should be within the limits shown in the chart below. 2. Measure the resistance of the common equipment and cables from the common equipment side of the station connector blocks. Resistance values should be within the limits shown in the chart below. Making Resistance Measurements Measured PairResistance In Ohms Multiline Telephone Single Line Telephone DSS/BLF Console Common Equipment Voice Pair 40–150 40–150 0.3–100 40–50 Data Pair 0.3–100 0.3–100 0.3–100 1–2 5.2 Making A Voltage Check Make the following voltage measurements at the station connector blocks under the following conditions: ·Bridging clips installed ·AC power connected to the common equipment Measure the voltage across one voice line and one data line and then across the other voice line and the other data line for each even and odd station. The measured voltage must be within the limits shown in the chart below. Making Voltage Measurements Station Under Test 66M-xx Block Connection Meter Lead Polarity Measured Voltage Odd StationVoice 1 + + 34 +/- 3 VDC Data 3 - Voice 2 + + 34 +/- 3 VDC Data 4 - Even StationVoice 5 + + 34 +/- 3 VDC Data 7 - Voice 6 + + 34 +/- 3 VDC Data 8 - Varriant readings can indicate a possible wiring, station, or common equipment problem. IMI89–173 Installing The Analog Station Board 14 – Installing The Analog Station Board
5.3 Causing An Analog Station To Self Test You can cause analog multiline stations to self test for proper operation per the following instructions: 1. Disconnect line cord at station base. NOTE: The adjacent odd or even station will be disabled during the time that the station line cord is being disconnected or reconnected. 2. Press and hold MUTE and reconnect line cord to station connector. Station will automatically perform self test routine. 3. Release MUTE as soon as test begins. Sequence of test is as follows: ·(a.) Indicators will light in sequence (b.) Indicators will then turn off at the same time (c.) Ringer will sound—be sure to set station ringer volume to medium or high setting 4. Replace any station that does not pass the self test. 5.4 Causing A DSS/BLF Console To Self Test You can cause the DSS/BLF Consoles to self test for proper operation as follows: 1. Disconnect console line cord plug from line. 2. Press and hold console button C10 while reconnecting line cord plug to line. NOTE: The companion station will be disabled during the time that the console is being disconnected and reconnected. 3. Release console button C10, and note that BLF indicators will each turn on in sequence beginning with station 10 indicator. Indicators will then turn off and console will become operational. 5.5 Understanding The Failure Indications If erratic light indications or ring signals occur at a paired station, an open data pair at either station may be the fault. A station with an open data line may work properly on a short loop but fail on a long loop. Stations are paired for overload current protection. If a fault occurs that causes more than 300 milliamps of current to be drawn, the overload paired stations are disabled by circuit action. Disconnect the disabled stations and reconnect them one at a time to isolate the faulty one. Installing The Analog Station Board IMI89–173 Installing The Analog Station Board – 15
Installing The Digital Station Board In The DXP Plus Digital Communications System 1.0 Introducing The Digital Station Boards The digital station board supports the operation of both the DigiTech and Impact digital multiline telephones. 1.1 Inventorying The Digital Station Boards There are two models of station boards available for use. ·Eight-station model supports eight DigiTech or Impact multiline and single line proprietary digital telephones ·16-station model supports 16 DigiTech or Impact multiline and single line proprietary digital telephones 1.2 Complying With Underwriters Laboratories Regulations Per The Underwriters Laboratories regulation 1459, 2nd edition, be aware of the following precautions when installing telephone equipment that is to be directly connected to the telephone company network: ·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. R 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 nor 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 22906. Printed in U.S.A.IMI89-174.01 7/95
2.0 Installing Circuit Boards CAUTION Circuit boards 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. 2.1 Creating A Static Safe Work Area When servicing the common equipment cabinet at the installation location, it is a good practice to place a conductive mat in front of the cabinet area and ground the mat to a good earth ground. (The third wire ground of the AC power line is also an acceptable grounding point.) The grounded conductive mat provides a safe static electric discharge path. When removing the common equipment cabinet from the installation location for servicing, it is a good practice to prepare a static-safe work area on which to place the cabinet. You should supply yourself with a static discharge wrist strap, and wear it every time you handle electronic circuit boards either at the cabinet mounting location or at your work area. IMI89–174 Installing The Digital Station Board 2 – Installing The Digital Station Board
Typical Earth Ground Static Wrist Strap ESD Protective Mat ESD Protective Mat ESD Protective Worksurface Static 2 Common Point Ground Creating A Static Safe Work Area Expansion Cabinet Expansion Cabinet Earth Ground 1 Meg Ohm Resister Conductive MatStatic Discharge Wrist Stap Common Equipment Cabinet PLUS035 Providing Static Protection At The Cabinet Mounting Location Installing The Digital Station Board IMI89–174 Installing The Digital Station Board – 3
2.2 Installing Station Boards In The Equipment Cabinet 1. Normally you should disconnect the AC power cord from the AC outlet and disconnect the optional battery back-up assembly from the main cabinet power supply; however, when necessary, you can install a station board in an operating system. If you must do this, connect one end of a standard telephone handset coil cord to the precharge port on the power supply. During step 5, you will connect the other end of this coil cord to the precharge jack on the station board. 2. 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 side of the cabinet is an appropriate grounding point since it should have a heavy ground wire connected between it and a good earth ground. 3. Each station board is supplied in a static protection bag for safe keeping. When you are ready to install the circuit board, remove it from its static protection bag. 4. Locate the proper board slot. ·On DXPPlussystems the station boards connect to any universal slot. NOTE: On DXPPlussystems, do not install a station board at the right-most board slot in the second (or lower) expansion cabinet. The system reserves this slot for internal use. 5. If you are installing the station board in an operating system, connect the free end of the precharge cord that you installed in step 1 to the precharge jack on the station board. 6. Orient the station board with its top and bottom guides in main cabinet board cage. and press the board firmly until its board edge connection properly mates with the connector on cabinet’s backplane. CAUTION When pressing circuit boards into place, press them only at the extractor lever locations. If you apply pressure at other locations you may damage the board assembly. 7. Repeat steps 3 and 4 until all circuit boards are installed. 8. Make a final inspection to ensure that all circuit boards are, oriented correctly and mated properly. 9. Install and tighten the supplied screws to secure the circuit boards to the board cage. 10. Each station board includes a ferrite collar. Snap the ferrite collar around the cable station to provide protection against radio frequency interference. IMI89–174 Installing The Digital Station Board 4 – Installing The Digital Station Board
Viewing A Typical Station Board Installation Static Discharge Wrist StrapPower Supply Pre-charge Port Analog or Digital Station Board Station Board Pre-charge Port Pre-charge Cable For Station Board Installation During Power Up PLUS029 Installing The Digital Station Board IMI89–174 Installing The Digital Station Board – 5
3.0 Connecting The Stations Connections between the telephone stations and the common equipment station boards are typically via type 66M-xx connector blocks that are cable connected to 50-pin male connectors on the station boards. The American Wire Gauge (AWG) size of the station wiring determines the maximum distance allowed from the common equipment to the stations. The following chart details this relationship. Station Type Wire Gauge 20 AWG 22 AWG 24 AWG Digital Telephone 2500 Feet 2000 Feet 1500 Feet If spare conductors exist in the cables that you run between the station boards and the 66M-xx connector blocks, it is a good practice to connect the spare conductors to earth ground. Doing this may help prevent the spare connectors from inducing radio frequency and/or AC interference into the system. Remember, you should snap a ferrite collar around each station cable to provide protection against radio frequency interference. 3.1 Installing DSS/BLF Consoles Install a DSS/BLF Console at any station port in the system as a companion to a system telephone. ·The DXPPlussystems support a maximum of four consoles for each telephone and there is no limit to the maximum number of consoles that you can install on a system. Typically, the console capacity is equal to one-half of the total station capacity of the system. ·The installed distance limit between the station board and the console is the same as that allowed for an analog or digital telephone. When you install a DSS/BLF console, you must program define the station port as a console port. IMI89–174 Installing The Digital Station Board 6 – Installing The Digital Station Board
Viewing A Typical Station Connection 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 CLIP TERMINALS 50 26 1 25 Typical Station Connector Block Ferrite Collar Female 50-pin Cable Connector J1 (Male 50-pin Connector) Typical Digital Station Board PLUS068 Installing The Digital Station Board IMI89–174 Installing The Digital Station Board – 7
3.2 Detailing The Station Connections 3.2.1 Detailing Digital Station Board Connections 25-Pair Connections Station Pair Connections Station Identification Wire Color PairPin No.Clip Term.Pair Identification Wire Color StationLocation(note the site position in this column) White-Blue 126 1 Signal PathGreen 1 Blue-White 1 2 Red White-Orange 227 3 Signal PathYellow 2 Orange-White 2 4 Black White-Green 328 5 Signal PathGreen 3 Green-White 3 6 Red White-Brown 429 7 Signal PathYellow 4 Brown-White 4 8 Black White-Slate 530 9 Signal PathGreen 5 Slate-White 5 10 Red Red-Blue 631 11 Signal PathYellow 6 Blue-Red 6 12 Black Red-Orange 732 13 Signal PathGreen 7 Orange-Red 7 14 Red Red-Green 833 15 Signal PathYellow 8 Green-Red 8 16 Black Red-Brown 934 17 Signal PathGreen 9 Brown-Red 9 18 Red Red-Slate 1035 19 Signal PathYellow 10 Slate-Red 10 20 Black Black-Blue 1136 21 Signal PathGreen 11 Blue-Black 11 22 Red Black-Orange 1237 23 Signal PathYellow 12 Orange-Black 12 24 Black Black-Green 1338 25 Signal PathGreen 13 Green-Black 13 26 Red Black-Brown 1439 27 Signal PathYellow 14 Brown-Black 14 28 Black Black-Slate 1540 29 Signal PathRed 15 Slate-Black 15 30 Green Yellow-Blue 1641 31 Signal PathYellow 16 Blue-Yellow 16 32 Black Yellow-Orange 1742 33 Orange-Yellow 17 34 Yellow-Green 1843 35 Green-Yellow 18 36 Yellow-Brown 1944 37 Brown-Yellow 19 38 Yellow-Slate 2045 39 Slate-Yellow 20 40 Violet-Blue 2146 41 Blue-Violet 21 42 Violet-Orange 2247 43 Orange-Violet 22 44 Violet-Green 2348 45 Green-Violet 23 46 Violet-Brown 2449 47 Brown-Violet 24 48 Violet-Slate 2550 49 Slate-Violet 25 50 The digital station board does not provide station connections on connector pairs 17–25. Remember, you should connect all unused conductors in your house cable to earth ground. IMI89–174 Installing The Digital Station Board 8 – Installing The Digital Station Board