2
-
Loop start central office lines
-
PABX station numbers
-
Centrex numbers
Refer to Figure 1 for a block diagram of a typical PABX
installation.
Features
- Ring trip on first ring
- 600 ohm output; 8 ohm output with AGC
- Multiple units may be used for multi-zone paging with
all call behind a PABX
- Music input
- Open loop detect
- Audio sensing circuit for reset
- Time out reset
- Manual reset
- Answer verification tone
- All call override tone
- Battery reversal indicator
- Auxiliary form C contacts
- Built-in connecting lock
- Powered by a receptacle mount power supply (included)
Limitations
When used with a PABX, the PABX must not return any
tones to the called party after calling party disconnect on
a station to station call.
Capacity
- Each STPA, when connected to its own PABX station
number, will provide one zone of paging.
- Use a STPA and a station number per zone for multi-
zone paging behind a PABX.
- An additional station number and STPA may be used to
provide all call or override in a one-way multi-zone
system behind a PABX.
Dimensions
-
8.25"H x 4.65"W x 2.25"D
(20.96 cm x 11.81 cm x 5.72 cm)
-
1.5 lbs. (.68 Kg)
Nominal Specifications
Tip and Ring Input
600 ohms
Voltage for Ring Trip
75-105VAC, 20 or 30Hz
Ring trip timing
150 ms
Open loop detect
150 ms starting 1 second
after ring trip
Audio sense release
4, 8, 16, 32, or 64
seconds after audio
drops below -22dbm
Time out release
4, 8, 16, 32, or 64 seconds
Manual reset
25 ms ground
Output 1:
Impedance
600 ohms
Page level
Output level = input level
-1 db
Music level
Output level = input level
Output 2:
Impedance
8 ohms
Page level
-10dbm
Music level
-17dbm
Music Source
8 to 600 ohm -10 to -18 dbm
Answer verification tone
500hz, 500 ms
All call override tone
500 hz, 250 ms on,
250 ms off
Form C Contacts
24 VDC, 3.0 amps or
105 VAC, 1.5 amps
Power Requirements
-21.5 to -26 VDC "B" Battery, 200 ma max. (power
supply included)
Environment
Temperature:
0 to 50 Degrees C
Humidity:
0 to 85% non-precipitating
INSTALLATION
Instructions
Each instruction is preceded by a line. Place a check on
the appropriate line as the instruction is completed. The
instructions also include tests along the way to verify
connections have been made correctly. If these steps are
followed properly, installation of the Clarity system will
go smoothly and quickly. If the results of a test do not
correspond with what is shown,
Do Not Proceed Until
the Problem has been Corrected.
ALL CALL IN
8 OHM OUT
ALL CALL AUDIO
T
IN
R
ZONE 1 IN
ALL CALL IN
8 OHM OUT
ALL CALL AUDIO
T
IN
R
ZONE 2 IN
ALL CALL OUT
8 OHM OUT
T
IN
R
ALL CALL IN
BLOCK DIAGRAM OF A TYPICAL PABX INSTALLATION
FIGURE 1
ONE-WAY
AMPLIFIED
SPEAKER
ASSEMBLIES
