Ericsson KH-500, Operator'S Manual, Page: 40 / 64

40
TELEPHONE INTERCONNECT CALLS
(KH-600 ONLY)
The operator may make telephone interconnect
calls on radio systems equipped for this option. One of
three pre-programmed numbers can be selected and
dialed automatically using either of the three keys on
the top row of the DTMF keypad. The telephone
numbers may also be manually dialed using the
keypad.
Communication takes place in a simplex mode. In
other words, you cannot talk and listen at the same
time. You must press and hold the PTT button each
time you wish to talk (transmit) and release it when you
wish to listen (receive).