Avaya LUPCMALL, Инструкция по установке и эксплуатации, Страница: 13 / 68

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5.1. Telephone System Connections
The PCMTIM module is the telephone interface module for the PCM Paging Control System. The PCMTIM provides the
telephone interface (including talk battery), night ringer input, emergency override input, and auxiliary relay contacts for the
system. The module is also responsible for all tone signaling features.
The PCM connects to virtually any telephone system: PBX station lines and CO lines, PBX loop start trunk ports, PBX ground
start trunk ports, and page ports (using contact closure).
Interface installation consists of setting Slide switches and connecting with modular (RJ11) telephone plugs.
Refer to the appropriate procedure in this section to connect the PCM System to the telephone system.
Note:
In all cases, make sure that power is off to the PCM and any amplifiers being connected to it before performing the
installation.
5.2. PBX Loop Start Trunk Port
In this configuration, the PCM unit supplies a 48V talk battery and loop current detection from pins 3 & 4 of the TRUNK
jack on the PCMTIM module to the loop start trunk in the telephone system. There are two modes of operation for loop
start trunk.
(1) When the unit detects a loop resistance between TIP and RING, it activates. When
the loop opens, the page ends. Pins 1, 2, 5 & 6 are not used in this configuration.
Note: Default and VOX timers are not used in this mode.
(2) The unit will operate as in mode one, except it will also provide a one-second hook
flash after the expiration of the VOX and/or Default timers. Operation in this mode
will enable the unit to automatically disconnect itself from the loop start trunk of
the PBX. This will prevent the paging system from being locked up indefinitely in
the event a telephone is accidentally left off hook after a page has been completed.
The feature codes are 014 to inhibit and 015 to enable this feature. The default
feature code is 014 (OFF).
1. Make sure that power is off and all connections completed before proceeding.
2. Move the Slide switches on the module to the position shown in Figure 5-1.
3. Use a modular telephone cord to connect the module to the phone system. Plug one
end of the cord into the Loop Start Trunk (using a modular jack) and the other end in
to the TRUNK jack on the module.
The center two conductors are Tip and Ring (48V DC) and have a specific polarity. If the
polarity of the trunk is opposite, you can use a reversing modular cord to make the
connection or reverse the connection through a modular block. Refer to
Figure 5-2 for more information.
IMPORTANT: The polarity of the Tip & Ring contacts of the RJ11 jack for the Trunk and Override were chosen so that
when a standard modular cord (one with the tops of both end plugs on the same side of the flat cable) is used to connect the
PCM to a modular wall block, the modular block G (Tip) terminal will be positive with respect to the R (Ring) terminal.
Because of variations in types of modular cords and when stripping a modular cord for direct connection, always check the
polarity of the center conductors or R & G terminals to determine Tip & Ring (the positive lead is Tip and the negative lead
is Ring).
5. System Wiring Connections
Figure 5-1: Loop Start
Telephone Selector Switches
Figure 5-2:
Loop Start/Ground Start RJ11