Installation Manual
6
Specific Instructions
Trunk Port Connections — Ground Start
Controls for VOX Delay, Page Time, and Mode Switch S5 are not operable in this mode.
Procedure
1.
Mount and ground the UPAM as described in General Instructions.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
Set mode switches S1 and S2 in OFF position for use with the 48-volt power supply, or ON position
if a 24-volt power supply is used.
Set mode switch S3 to ON position and S4 to OFF position (see Note 1).
Connect a jumper wire between
N.O.
and
T
terminals on UPAM.
Connect “Tip” of trunk port to COM terminal on UPAM.
Connect “Ring” of trunk port to R terminal on UPAM.
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.
Connect UPAM +24/48V terminal to PBX ground (see Note 2).
Connect power supply + and - terminals to +24V/48V and -24V/48V terminals on UPAM,
respectively. Plug the power supply into a grounded 110VAC wall outlet.
Call the system and adjust the volume of the page using the paging system’s amplifier volume control.
Hang up and adjust the background music level using UPAM BGM VOL control.
Call the system and adjust the volume of the preannounce tone using UPAM TONE VOL control.
Notes:
1. Only preannounce tone is available for ground start trunk applications.
2. Usually the AC GND terminal on the 48 volt power supply included can be used to provide this
connection.