Comdial Dxp Plus Instructions Manual
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Pre-charge jack Pre-charge jack Pre-charge jack Universal board slots 1 - 11 Pre-charge cable for installation during power up Connect board to any universal board slotUniversal board slots 1 - 9 Universal board slots 1 - 10 DO NOT install boards in last slot on right in lower expansion cabinet.Static discharge wrist strap Pre-charge jack PLUS011A Installing The DXPT1 Board Installing The DXPT1 Line Board IMI89–193 Installing The DXPT1 Line Board – 11
4.1 Connecting The T1 Trunk Terminate the end of the T1 trunk with a miniature 8-pin modular plug, and plug it into the main jack on the front edge of the DXPT1 board. The DXPT1 board contains a built-in CSU that protects the DXP Plus from voltage surges, provides transmission drive up to 6,000 feet, and performs diagnostic tests for the network. Therefore, a customer-supplied CSU is not necessary unless your customer requires this addition. If a direct connection to a repeater is within a few hundred feet, the transmit signal from the DXPT1 board may overdrive the repeater. Repeaters normally operate best with -7.5 to -23 dB input signals. Arrange LIU switches 2, 3, and 4 to set the transmit signal level (0 dB is default). IMPORTANT CAUTION To help ensure that external over-voltage surges do not damage the system, Comdial engineers suggest that you install a properly-grounded gas discharge tube or a similar primary protection device on the T1 trunk where it enters the building. If the site includes a network interface box, verify that there is standard lightning protection installed externally to the box on its network side. Primary protection where the cable enters the building is necessary to prevent a fire hazard inside the building. IMI89–193 Installing The DXPT1 Line Board 12 – Installing The DXPT1 Line Board
T1003A Front View of Main Connector On DXPT1 Board No connections are allowed to pins 7 or 8. (Issue 2 boards ONLY.) NOTE: 1R1 RC1 ReceiveC1 Transmit T1 T 2 3 4 5 6 7 8 Connecting The TI Trunk To The DXPT1 Circuit Board Installing The DXPT1 Line Board IMI89–193 Installing The DXPT1 Line Board – 13
4.2 Detailing The T1 Cable Requirements Normally, the DXPT1 board connection to a central office is via a network interface box (smart jack). The box is usually small with an 8-pin modular telephone jack for connecting to the customer premise T1 equipment (DXPT1). For short lengths of approximately 200 feet or less, use a standard telephone cable with an 8-pin modular plug for connection to the DXPT1. Make straight-through connections for pins 1, 2, 4, and 5 when using these plugs on both ends of the cable. (Do not connect Pins 7 and 8.) When spanning distances greater than 200 feet, use a low-capacitance cable (data-grade cable) having two twisted, solid-conductor wire pairs with shielding. The type of cable with metal shielding covering each twisted pair provides the best immunity from electrical interference. Only connect the shielding to earth ground at one end of the cable—do not ground the shielding at the other end of the cable. When connecting the local DXPPlusdirectly to another DXPPlussystem, be sure to connect the transmit pair (pins 4 and 5) of the local system to the receive pair (pins 1 and 2) of the distant system. Likewise, connect the receive pair (pins 1 and 2) of the local system to the transmit pair (pins 4 and 5) of the distant system. IMI89–193 Installing The DXPT1 Line Board 14 – Installing The DXPT1 Line Board
4.3 Understanding The DXP Plus Logical Numbering Because there are no dedicated station or line ports in the DXPPlus, the system uses an automatic configuration method to logically number its stations and lines. Automatic configuration occurs after you perform a master clear on the system. How automatic configuration works With automatic configuration, the system does a search for all installed station and line boards in the main and expansion cabinets, and assigns a logical number for each provided station and line encountered during the search. The search begins in the main cabinet at the left-most universal slot and proceeds left to right. The search then moves to the upper expansion cabinet where it searches left-most slot to right-most slot. The search finally moves to the lower expansion cabinet where it again searches left-most slot to right-most slot. When automatic configuration is finished, the system has logically numbered all station and line ports in ascending order from the left-most slot to right-most slot throughout the entire system. How logical number and physical location relate to one another The logical number of a station or line corresponds to its relationship to other stations or lines in the system but is not dependent upon the board’s placement in the cabinet. The physical location of a station or line corresponds to the order of the system’s board slots. The main cabinet contains slots 1–9, the upper expansion cabinet contains slots 10–20, and the lower expansion cabinet contains slots 21–30. Therefore, even if the first encountered station board is located in slot five of the main cabinet, the system still assigns logical number one to the first station provided by that board. During installation, you can skip slots. For example, you can install eight-line, loop start, line boards in only slots one and 30 if you wish. In this case, slot one yields logical line numbers 1–8 and slot 30 yields logical line numbers 9–17. Where you can place circuit boards Each installed board requires timing circuits equal to its capacity. For example, a 16–station board requires 16 timing circuits, an eight–line loop start line board requires eight circuits, and a fully configured T1 trunk board requires 24 timing circuits. In the DXP Plus, each universal slot provides 32 timing circuits. Because of this timing circuit provision of each slot, you can place any station or line board at any slot location with no restrictions. Adding boards without renumbering If you install or relocate a station or line board, this board does not operate until you take appropriate programming action. If you use an available open slot for adding or relocating a board, that board’s stations or lines assume logical numbers in sequence after the system’s last assigned logical station or line number. For example, if the system’s last logical station number is 24, the logical numbers of the newly installed board’s stations begin at logical number 25. After you remove a board and delete it through programming, that board’s logical numbers are available for reassignment. This means that you can remove a board, add or move another board, take the appropriate programming action, and have the stations or lines of the added or relocated board assume the logical numbers made available by the removed board. For example, if the system’s last logical number is 64 and you remove the board providing stations with logical numbers 1–16 and delete it through programming, the stations on an added board assume logical numbers beginning with 1 instead of 65. However, if you remove and program delete an eight-station board and add a 16-station board, the first eight stations stations on the added board assume logical numbers 1–8 and the last eight stations assume logical numbers 65–72. Remember, should you master clear the system, the automatic configuration feature logically numbers all station and line ports in ascending order from the left-most slot to right-most slot throughout the entire system. This action renumbers those station and lines provided by boards that you have added or relocated since you last performed the system master clear. Installing The DXPT1 Line Board IMI89–193 Installing The DXPT1 Line Board – 15
5.0 Installing The Syncronization Card On The Services Board Whenever you install one or more DXPT1 boards, and the DXP Plus is receiving its timing signals from an external source, you must install one synchronization card (DXOPT–SYN) on the services board using the following procedure. NOTE: Whenever you install one or more DXPT1 boards, and the DXP Plus is receiving its timing signals from an external source, you must install one synchronization card (DXOPT–SYN) on the services board. When you connect the system to central office (CO) lines, you must include a synchronization card, and the DXP Plus must be controlled by CO signalling. In installations where the DXP Plus supplies the clock signal for the distant system, there is no requirement for DXOPT–SYN cards and you do not need to perform this procedure. 1. Switch off the DXP Plus power supply, disconnect the AC power cord from the AC outlet and disconnect the optional battery back-up assembly from the main cabinet power supply 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 3. Loosen the retaining hardware and lift the front panel away from the common equipment cabinet. 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. CAUTION Do not remove or install the services board while the DXP Plus is powered-on or severe system problems may occur. 4. Locate the services board, loosen the retaining screws, remove it from the main cabinet, place it in a static protection bag, and transport it to the static-safe work area. 5. At the static-safe work area, with your wrist strap in place, remove the services board and the DXOPT–SYN card (if used) from their static protection bags. 6. Refer to the illustration, and install the DXOPT–SYN card at the top position on the services board with the supplied hardware. (Actually, you can use any of the three positions; however, other non-related option cards require installation in the lower positions so it is best to leave these positions open for those other uses.). 7. Use the method detailed in Section 5.1 to set the strapping switches on the services board. If you wish, refer to step 8 for details, and transport the board assembly to the cabinet installation site before you set the strapping switches. 8. Place the services board with the newly installed DXOPT–SYN card into a static protection bag and transport the assembly back to the main cabinet. IMI89–193 Installing The DXPT1 Line Board 16 – Installing The DXPT1 Line Board
Installing The Synchronization Card On The Services Board Installing The DXPT1 Line Board IMI89–193 Installing The DXPT1 Line Board – 17
5.1 Configuring The Services and Interface Boards The DXP Plus extracts clocking information from the central office (CO) that supplies the T1 lines, and routes this information to the DXOPT–SYN sync card. The sync card uses this clocking information to derive the synchronizing signal for the DXPT1 board’s transmit clock signal. Therefore, the DXPT1 board’s transmit clock is slaved to the CO supplying the T1 lines. If there is only one CO supplier, that source is the primary clock source; however, if there are two different suppliers of T1 lines, use the more reliable T1 supplier as the primary source and the other T1 supplier as the secondary source. You must designate one DXPT1 board as the primary board. Choose this board from among those boards that interface the T1 lines supplied by the primary CO supplier. Designate the primary board by placing straps on the DXSRV–PLS services board and by setting DIP switches on the expansion cabinet interface boards. If you system has only one CO supplier, you do not need to designate a secondary board; however, if the system has a second CO supplier of T1 lines, you must designate one DXPT1 board as the secondary board. Choose this board from among those boards that interface the T1 lines supplied by the second CO supplier. Designate the secondary board by placing straps on the services board or by setting DIP switches on the expansion cabinet interface boards. If you designate primary and secondary boards to the system even though there is only one CO clock source, the DXOPT–SYN card functions as though it is receiving two clock signals and lights both PRI and SEC LEDs on the front edge of the card. IMI89–193 Installing The DXPT1 Line Board 18 – Installing The DXPT1 Line Board
5.1.1 Summerizing the Strapping DXPT1 Cabinet LocationServices Board Strap PRIMARY or SECONDARY*Expansion Cabinet Interface Board Switch Setting SWA or SWB** Main –UNV1 A Main–UNV2 B Main–UNV3 C Main–UNV4 D Main–UNV5 E Main–UNV6 F Main–UNV7 G Main–UNV8 H Main–UNV9 I Upper Expansion–UNV1 J or K 1 Upper Expansion–UNV2 J or K 2 Upper Expansion–UNV3 J or K 3 Upper Expansion–UNV4 J or K 4 Upper Expansion–UNV5 J or K 5 Upper Expansion–UNV6 J or K 6 Upper Expansion–UNV7 J or K 7 Upper Expansion–UNV8 J or K 8 Upper Expansion–UNV9 J or K 9 Upper Expansion–UNV10 J or K 10 Upper Expansion–UNV11 J or K 11 Lower Expansion–UNV1 L or M 1 Lower Expansion UNV2 L or M 2 Lower Expansion UNV3 L or M 3 Lower Expansion UNV4 L or M 4 Lower Expansion UNV5 L or M 5 Lower Expansion UNV6 L or M 6 Lower Expansion UNV7 L or M 7 Lower Expansion UNV8 L or M 8 Lower Expansion UNV9 L or M 9 Lower Expansion UNV10 L or M 10 * Strap PRIMARY block for primary DXPT1 and/or strap SECONDARY block for secondary DXPT1. ** Switches A and B do not designate primary or secondary—they designate the first and second DXPT1 boards installed in an expansion cabinet. Installing The DXPT1 Line Board IMI89–193 Installing The DXPT1 Line Board – 19
5.1.2 Setting The Strapping Configure the services and interface boards by performing the steps in the following process. 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 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. 2. Remove the services board assembly from the static protection bag. 3. Identify the main cabinet board slots where you will install the DXPT1 boards, and the primary and secondary (if available) CO line supplier. With this knowledge, designate one DXPT1 board as primary and another DXPT1 board as secondary by placing straps on the services board. (a)If you install one DXPT1 board in the main cabinet, you must strap one pin-pair (A–I) on the services board’s PRIMARY strap block. This strap designates the main cabinet slot where you installed the DXPT1 board. Example: If you install a DXPT1 board in universal slot two in the main cabinet, you must strap pin-pair B on the PRIMARY strap block . (b)If you install two or more DXPT1 boards in the main cabinet, you must designate one board as the primary board and another as the secondary board. After you have made these designations, you must strap one pin-pair (A–I) on the services board’s PRIMARY strap block and one pin-pair (A–I) on its SECONDARY strap block to designate the main cabinet slots where you have installed the primary and secondary boards.This action designates the primary clock source for the DXOPT–SYN card. Example: If you install two DXPT1 boards in universal slots two and three in the main cabinet and you designate these boards primary and secondary respectively, you must strap pin-pair B on the PRIMARY strap block and strap pin-pair C on the SECONDARY strap block. IMI89–193 Installing The DXPT1 Line Board 20 – Installing The DXPT1 Line Board