Specifications

17
CONFIGURATION 7:
TWO-WAY TALK BACK PAGING SYSTEM
This configuration is essentially the same as the one-way paging system described previously. The main difference between the one-
way configuration and this configuration is that the centralized high-power amplifier is connected to the PCMTBM module instead of the
PCMCPU module. The required setup includes: PCMTIM - PCMCPU - PCMTBM - PCMZPM - PCMPS2. Modules must be assembled,
from left to right, in this order.
Notes: Talk Back is only available in High-Power Zones with 25 & 70V AC speakers. The paging access output from the
telephone system must support two-way communications.
INSTALLATION:
STEP 1: Assemble Modules PCMTIM to PCMCPU and to PCMZPM (see Illustration/Instructions on Appendix page 37,
then return to this page and complete the following Steps).
Note: DO NOT
connect the PCMPS2 (power supply) at this point.
STEP 2: Connecting Telephone System Paging Output to the PCMTIM
• Refer to paging access modes described previously in Step 2 on page 5 (paging port/contact closure), page 7 (paging port/VOX),
page 9 (loop start trunk), page 11 (ground start trunk), or page 13 (station level/Centrex).
STEP 3: Switch Settings
• Set the two slide switches on the PCMTIM to match the paging output setting from the telephone system based on the type of in-
terface used. See the first bullet within STEP 3 on page 5 if using Page Port Contact Closure; page 7 for Page Port VOX; page 9
for Loop Start Trunk; page 11 for Ground Start Trunk; or page 13 for Station Level/Centrex.
• Set the SYS-ID DIP switches on the PCMCPU to the OFF position (to the left).
• Set the RUN-PROGRAM switch on the PCMCPU to the RUN mode (up).
• Set the TALK BACK switches for the zones requiring two-way talk back to the ON position (right) on the PCMZPM module.
• Set the OUTPUT switch on the PCMZPM module to the HI-PWR position (down).
STEP 4: Testing your System
• Connect power supply PCMPS2 to the PCMCPU module to either the power jack 12V DC input or wire it to the 12V DC
screw terminals observing polarity.
• At this point all the power LEDs should be lit on each module.
• Access the paging from the phone system and verify access tones (double beep) in handset.
• Speak into the handset and listen. You should be able to hear the Talk Back Relay clicking back and forth inside the PCMTBM
module. (You must be near the PCM unit to hear it.)
• At this point, the system should be functioning properly.
• Disconnect Power Supply.
STEP 5: Connecting the Paging Amplifier
• Locate the terminals on the PCMTBM module labeled PA OUT/RT and wire to the COMMON and either 25 or 70V output on the
Bogen paging amplifier (either TPU-Series, GS-Series or Classic Series).
• Locate the terminals on the PCMTBM module labeled PA IN/RT and wire to the TIP and RING input on the Bogen paging amplifier.
STEP 6: Connecting 25 & 70V AC Speakers
• Locate the terminals on the PCMZPM module labeled ZONE A. These terminals have two connections marked + and - .
Wire your speakers for ZONE ONE to these terminals. Observe polarity (-) to common (+) to selected tap setting.
• Follow the same procedure for the terminals labeled ZONE B for ZONE TWO, and the terminals labeled ZONE C
for ZONE THREE.
STEP 7: Testing your System
• Connect the power supply PCMPS2 to the PCMCPU module to either the power jack 12V DC input or wire it to the 12V DC
screw terminals observing polarity.
• Connect the Bogen amplifier to the AC power outlet (120V AC 60Hz).
• Set the volume on your Bogen amplifier to a 1/2 turn.
• Access the paging from the telephone system and listen (on the handset) for the confirmation tone (double beep).
• Dial 01 to access ZONE ONE and listen (on the handset and also to the speakers) for a pre-announce tone (single beep).
At this point you should be able to hear audio from the location where the speaker for ZONE ONE is installed.
• The volume and delay controls on the PCMTBM module control the audio back into the handset. Adjust these controls
for best operation.
• Set the Bogen amplifier to the desired volume level.