Instruction manual

Installation
68 025-9416
The highlighted jumpers on the peripheral motherboard control the station output as described in
Table 11.
Table 11. Peripheral Mother Board Jumper Settings
Jumper Function Settings Default
JP1 Receive voice audio from Talkback
pager
A - flat
B - de-emphasized
A
JP2 Transmit tone to transmitter A - flat
B - pre-emphasized
A
JP3 Enables Talkback audio path or
separate tone output
A - tone output
B - Talkback enabled
(tx and rx audio)
B
JP4 COR (busy) polarity A - active high
B - active low
B
JP5 Transmit voice audio to transmitter
A - flat
B - pre-emphasized
A
JP6 Terminal busy polarity A - active high
B - active low
B
Colocated Transmitters
Direct cable hookup between the Model 640 and a colocated radio transmitter is commonly used
for local area paging, such as hospital and industrial plant applications. The General Electric
MASTR II is an example of this type of transmitter. It is capable of digital paging using GE’s
modulator conversion kit.
The cable hookup depends on the specific radio station used. The Model 640 interface may be
accomplished by way of an RJ21X punchdown block (see “66-Type Punchdown Block
Installation” on page 55), or by way of an optional terminal block adapter (see “Installation
Interface Assembly” on page 52).