Installation Manual
8
Specific Instructions
Station Port/Centrex Connections
Disconnect methods
In station port operation, the UPAM provides CPC — calling-party-controlled (loop current interrup-
tion) disconnect, default timer disconnect, or optional voice-operated (VOX) disconnect. The calling-
party-controlled disconnect recognizes a line-issued disconnect signal and immediately disengages the
UPAM from the line (this feature cannot be adjusted or inhibited). The default timer causes the UPAM to
release after a user-determined period of time ensuring that the UPAM will always disengage the line if
the other disconnect functions are disabled or inoperative. (The default time is approximately 6 to 35
seconds, but can be increased or inhibited; see Default Timer Modifications, on the next page.) The
voice-operated (VOX) disconnect feature has the ability to preempt the default timer and disconnect the
line after a predetermined interval of silence (approx. 2 to 6 seconds, set with
VOX DELAY)
has elapsed.
The VOX feature is turned on or off with mode switch S5.
Procedure
No power supply is used for Station Port/Centrex operation.
1.
Mount and the ground the UPAM as described in General Instructions.
2.
Set mode switches S3 and S4 for Preannounce or Confirmation tone (as desired).
One of these modes must be selected for UPAM to operate correctly.
3.
Place mode switch S5 in the Off position.
4.
Connect “Tip” of station port to T terminal of UPAM.
5.
Connect “Ring” of station port to R terminal of UPAM.
6.
Connect PT and PR terminals on UPAM to the paging system, as shown in Section 3. Also, connect
any background music source to the BGM IN jack on the UPAM.
7.
Set the Default Timer by calling the system, and measuring the length of time before the call is
disconnected. Adjust the PAGING TIME control and repeat and readjust as necessary.
8.
Call system and set the page volume using the paging system’s amplifier volume control.
9.
Hang up and adjust the background music level using UPAM BGM VOL control.
10.
Call the system and adjust the volume of the preannounce/confirmation tone volume using the
TONE
VOL
control. (Note: If the tone can be heard over the paging system but is shortened, or if it is absent
in the handset, it may be necessary to increase the length of ring before the UPAM answers. See Ring
Delay on page 10.)
11
If the VOX disconnect is to be used, adjust the VOX delay. To do this, make sure mode switch S5 is
in the ON position and proceed as follows:
11.1 Rotate VOX DELAY control approximately 1/2 way.
11.2 Call the system and, after the preannounce or confirmation tone, speak into the telephone for
5 seconds at a normal voice level then stop and evaluate the time delay before disconnection.
If it is sufficiently long to allow for pauses in phrases without disconnecting, proceed to the
next step. If necessary, readjust VOX DELAY and repeat step.
Note: The minimum VOX delay is approximately 2 seconds. On some systems, which return
a reorder tone to the called party within 2 seconds of hang up, VOX DELAY cannot be used.