P82030 K
Sheet 14 of 17
Figure 13.
Hang Up Tone Frequency Detector
When shipped from the factory, the frequency is set to minimum (200Hz), and is adjustable up to 950Hz. The adjustment
procedure is as follows:
1.
Initiate a page to TPI-100.
2.
Hang up phone.
3.
When the Hang Up Tone comes on, adjust the potentiometer until the TPI-100 disconnects.
4.
Initiate a page to TPI-100
5.
Hang up phone.
6.
The TPI-100 should disconnect immediately upon detecting the Hang Up Tone. If the TPI-100 does not disconnect
immediately, repeat adjustment procedures.
The Page Duration Timer
potentiometer is shown in Figure 14. It is used with telephone systems with a delayed Hang Up
Tone that cannot be detected by the frequency detector, or with systems that do not generate a Hang Up Tone (remain silent).
For telephone systems with Hang Up Tones that can be detected by the frequency detector, the Page Duration Timer (set at 51
seconds with its Timer Control Jumper in the "VOX" position) also serves as a back-up disconnect device in one-way paging
applications if the paging party inadvertently does not hang up.
Figure 14.
Page Duration Timer
When shipped from the factory the timer is set to 51 seconds (maximum). If the Timer Control Jumper is set for "VOX" control,
then the timer begins to time out when audio is no longer detected on Tip and Ring. If the Timer Control Jumper is set for
