Comdial Dxp Plus Instructions Manual
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3.6 Using The Modem The modem is a general-purpose, *Hayes TM compatible, 300, 1200, and 2400 automatic baud detect serial modem. The CPU board provides a dedicated serial data port and power port for the modem. If you connect the modem to a serial data port on one of the communications cards, you will have to program the system for modem operation on that port. *Hayes is a registered trademark of Hayes Microcomputer Products. SERIAL Status PWR Line PLUS013 Power Cord Serial Port Cord Figure 8: Modem GCA40–130 DXP Plus General Description 18 – Reviewing The Hardware
3.7 Using The Ring Generator The DXPPlusdigital communications system supports the use of industry-standard telephones (IST). To use ISTs, the system requires a ring generator assembly to supply ringing voltage and message waiting voltage to the industry-standard telephones. Regardless of the number of installed industry-standard telephones, you will need to install one ring generator assembly in each common equipment cabinet that has IST telephones connected. Power Supply Assembly Ring Generator Assembly Ring Generator Cable Power Cable PLUS030 Figure 9: Ring Generator DXP Plus General Description GCA40–130 Reviewing The Hardware – 19
3.8 Understanding The Board Configuration Physical vs. Logical board locationThe DXPPlususes two distinctions for station and line locations: the physical location and the logical location. Thephysical locationcorresponds to the order of the universal slots in the system; these physical slot locations never change. There are a possible 30 physical slot locations in the DXP Plus(nine slots in the main cabinet, eleven slots in the upper expansion cabinet, and ten slots in the lower expansion cabinet–see figure 10 for physical board locations), and no matter what board you install in the first universal slot of the main cabinet, for example, that slot is always physical slot one. The physical slot numbers begin with the first universal slot in the main cabinet and move from left to right. The first universal slot in the upper expansion cabinet is physical slot number 10, and the first universal slot in the lower cabinet is physical slot 21. Installers need to know the physical location of the boards in order to properly wire the lines and stations. Thelogical locationof a station or a line corresponds to its relationship to the other stations or lines in the system and is not dependent upon the board’s location in the cabinet. Therefore, if you have installed your first station board into the fifth slot of the main cabinet, for example, the system still refers to the first station on that board as logical station one (station one always defaults with intercom 1001). PLUS067 Physical Slots 10 –20 Physical Slots 1 –9 Physical Slots 21 –30 Figure 10: Physical Board Locations GCA40–130 DXP Plus General Description 20 – Reviewing The Hardware
How automatic configuration worksBecause there are no dedicated station or line ports in the DXPPlus,the system uses an automatic configuration method to number the lines and stations. When you master clear the system, it automatically searches for all installed line and station boards in the main and expansion cabinets. Once the system has identified the board type and location, it automatically numbers the ports on every installed board (see the section below, “How the system renumbers logical ports,” for more information on renumbering). How the system renumbers logical portsThe automatic renumbering configuration, which renumbers thelogicalports, begins at the left-most universal slot in the main cabinet and proceeds left to right. When the system has configured all of the boards in the main cabinet, it moves to the upper expansion cabinet and continues searching from left to right. Finally, the system searches the lower expansion cabinet, again from left to right, until it has numbered all of the lines and stations. When the configuration is finished, the line and station ports are numbered logically from left to right in each cabinet throughout the system. Adding boards without renumberingWhen you install additional boards or relocate existing boards after the system is in service, the logical numbers of the stations or lines on the added board continue from the last assigned logical number. For example, if your last assigned station number was 16, the next station number will be 17, regardless of the board’s physical slot. After you remove and delete a board through programming, that board’s logical ports are available for reassignment. So an added or relocated board would then take the logical port numbers from the removed board and not from the end of the logical sequence. For example, if you had 64 stations and were to remove a station board that had held logical stations 1–16, the next station board that you installed would occupy logical station ports 1–16 and not ports 64–80. If you were to remove an 8-port board and replace it with a 16-port board, the first eight ports on the new board would replace the original eight logical port numbers, and the remaining eight ports would begin with the last assigned logical port. So using our same scenario, the new 16-port board would have logical ports 1–8 and 64–72. DXP Plus General Description GCA40–130 Reviewing The Hardware – 21
3.9 Mounting Considerations When installing the DXPPlusdigital communications system, take note of the following requirements (figure 11 shows the mounting dimensions): NOTE: The following instructions describe how to mount the main cabinet using a backboard; however, you can mount the cabinet on a standard 23–inch equipment rack if you wish. ·Always choose a secure and dry mounting location that has plenty of ventilation. Be sure that the temperature range of the location is within 32-122 degrees F (0-50 degrees C) and that the humidity is less than 90 percent, non-condensing. ·Locate the equipment within four feet of a proper AC electrical outlet dedicated exclusively to this equipment. The outlet must be a 117 VAC 15 AMP circuit with a third-wire ground supplied to a standard electrical outlet (NEMA 5-15R) ·Locate the equipment within 25 feet of the TELCO/PBX jacks—this is an FCC requirement. A nominal distance of seven feet is ideal. ·Use a reliable earth ground—a metal cold water pipe or a metal building frame ground. ·Use a backboard of at least 3/4-inch thick plywood to mount the DXPPluscommon equipment. It is a good practice to make this backboard large enough to accommodate the main cabinet, the expansion cabinet, and a battery backup assembly even though the initial installation may not require all of this equipment. ·Always bridge underlying wall studs with the backboard and drive the attaching hardware through the backboard and through the underlying wall into the wall studs. Allow space between the top and bottom of the main cabinet for later placement of an expansion cabinet above the main cabinet. GCA40–130 DXP Plus General Description 22 – Reviewing The Hardware
22 5/16 Expansion Cabinet 1 Panel Retaining Screws Panel Retaining Screws Panel Retaining Screws Typical Backboard 48 X 96 3/4 Plywood Sheet Main Cabinet Expansion Cabinet 2 12 3/4 10 1/2 10 1/2 10 1/2 10 1/2 10 1/2 10 1/24 3/4 4 3/4 48 PLUS024 Figure 11: Mounting The Cabinets DXP Plus General Description GCA40–130 Reviewing The Hardware – 23
3.10 Using The Power Supply What the power supply doesEach cabinet in the DXPPlussystem has its own power supply. The power supply provides + and – 5 VDC operating power for the circuit boards and – 36 VDC for all of the telephone stations. Each power supply is located in the top right corner of the respective cabinet (see figure 12 for power supply locations). Power supply requirementsFor the AC power connection, employ a dedicated 117VAC 15 AMP circuit, with a third-wire ground, supplied to a standard electrical outlet (NEMA 5-15R). Remember, this electrical outlet must be located within four feet of the common equipment cabinet. You must supplytwodedicated electrical outlets, each protected by its own circuit breaker, if you plan to install expansion cabinets. CAUTION The dedicated AC circuit for the expansion cabinets must be different from the dedicated AC circuit that you provide for the main cabinet. Where to connect the power supplyIf you install the optional battery back-up assembly, you can use the main cabinet’s electrical outlet to supply AC power to that assembly’s battery charger. To provide protection against surges and spikes that may appear on the AC line, install a plug-in power line surge protector between the AC power cord of the installed equipment and the AC outlet. The common equipment cabinet employs a fan-cooled electronic switching power supply (ensure that the fan can always provide unobstructed air flow for cooling). During operation, power supplies of this type generate an audible sound from their switching regulators. This sound is normal and is not an indication that the power supply is operating improperly. CAUTION DO NOT attach or secure the line cord to the surface of the mounting location in any manner. GCA40–130 DXP Plus General Description 24 – Reviewing The Hardware
Plug-In Power Line Surge Protectors Typical Earth Ground Power Cable Two Dedicated 117 VAC 15 Amp NEMA 5-15R Electrical Outlets With Third Wire Ground (Each Is Protected By Its Own Circuit Breaker.) PLUS038 Two 15 AMP Circuit Breakers Ganged Together Figure 12: Power Connections DXP Plus General Description GCA40–130 Reviewing The Hardware – 25
3.11 Using The Battery Backup What the battery backup doesShould the AC power to the system be interrupted, one external battery assembly provides 1.0 hour of operation for a fully loaded system (for information on battery backup time using expansion cabinets, see the section below,“How to calculate battery backup time”). During AC operation, the external battery assembly accepts re-charging current to maintain the voltage potential of its batteries at an operational level. The measured voltage the battery backup is 34.5 volts when the batteries are fully charged. Battery backup componentsYou can only install one battery backup per system. The battery backup assembly includes the following items: ·Batteries: Five 6-volt, 50 ampere-hour, (Comdial product code BT000-141), charger unit and interface cables. ·Metal enclosure with wire harness, includes combination circuit breaker, on/off switch. How to calculate backup time Calculate the minimum battery backup time provided by a battery backup assembly to a fully configured DXP Plussystem using the following formula: T= Back-up time in hours K =0.85 (Constant) e= 50 (ampere-hour capacity of battery backup assembly) N= Total number of stations Example: Assume that you have installed a DXPPluswith three cabinets supporting 472 telephones and containing one line board along with a battery backup assembly to provide back-up power. NOTE:The external battery assembly requires a maximum of 10 hours to completely re-charge to full potential after it has been completely discharged and, in some cases, when initially installed. T=Ke 1 + [(0.084) (N)] T=(.82)(50) 41.0 1 + [(0.084) (472)]= 40.65=1.0 Hour GCA40–130 DXP Plus General Description 26 – Reviewing The Hardware
Figure 13: Battery Backup Connections PLUS004 Circuit Breaker Power Line Surge Protector Dedicated AC Outlet DXP Plus General Description GCA40–130 Reviewing The Hardware – 27