P82030 K
Sheet 2 of 17
GENERAL APPLICATION INFORMATION:
The Telephone Paging Interface (TPI-100) provides ring start (90V/20Hz) paging access from:
A. A Central Office (CO) line.
B. A Centrex number line.
C. A station level position on telephone systems which provide analog ring voltage (90V/20Hz), and 600 OHM audio to their
extension phones.
The TPI-100 is a ring detector that monitors the line for ring voltage. When ring voltage is detected, the caller is connected to
the paging system.
Paging is accomplished by touch tone (DTMF) dialing the CO line, Centrex line, or station extension number. After one ring,
the TPI-100 will simultaneously:
A. Generate a single Confirmation Tone to the caller.
B. Generate a single Page Alert Tone to the paging system.
C. Connect the caller to the paging system.
The Confirmation/Page Alert Tone volume is internally adjustable, and has an "Off" position.
When a caller hangs up the telephone at the conclusion of a page, some telephone systems generate an immediate Hang Up Tone
to the paging system, some generate a delayed Hang Up Tone, while others remain silent. The TPI-100 can interface a paging
system with all of these telephone systems, because it will disconnect the paging system before the Hang Up Tone can be
transmitted over the paging system speakers.
For telephone systems that generate a delayed or immediate Hang Up Tone, the TPI-100 is equipped with a variable Frequency
Detector (200 to 950Hz) which is adjusted during installation to detect the telephone system's specific Hang Up Tone frequency.
When that frequency is detected on Tip and Ring, the TPI-100 will disconnect the paging system.
For telephone systems that generate a Hang Up Tone with a frequency that cannot be detected by the TPI-100's Frequency
Detector, or for telephone systems that do not generate a Hang Up Tone (remain silent), the TPI-100 is equipped with a variable
Page Duration Timer (3 to 51 seconds). The timer is set during installation to disconnect the paging system by:
A. Timing out before the occurrence of the Hang Up Tone or…
B. Simply timing out, for telephone systems that remain silent.
Whenever the Tone Frequency Detector is used:
A. It will take precedence over the Page Duration Timer.
B. The Page Duration Timer is placed in the maximum (51 seconds) position.
Chart 1 shows the proper application of the Tone Frequency Detector and the Page Duration Timer.
Telephone System
"Hang Up" Tone
Tone Frequency
Detector
Page Duration
Timer
Immediate Yes
Yes
Delayed Yes
Yes
Cannot be detected by
Frequency Detector
No
Yes
None (Silent)
No
Yes
Chart 1.
Application of Tone Frequency Detector and Page Duration Timer
The Page Duration Timer is programmed for "VOX" (Voice Operated) or "MAN." (Manual) control using the Timer Control
Jumper, as shown in Chart 2.
Position of Timer Control Jumper for:
Position of
