Service manual

OPERATION
3-9
April 2001
Part No. 001-9800-203
If the transceiver is programmed to not detect an
off-hook condition, taking the microphone off-hook
does not disable scanning or enable the monitor mode.
The option switch or the Transmit Disable On Busy
feature must then be used to perform monitoring.
3.4.8 PLACING AND RECEIVING STANDARD
(DISPATCH) CALLS
NOTE: The following procedure applies to both
LTR and conventional operating modes.
Standard (dispatch) calls are between two or more
mobile or control station transceivers. Unlike tele-
phone calls, no number is dialed when the call is
placed. Proceed as follows to place and receive a
standard call:
Placing a Standard Call
1. Turn transceiver power on and set the volume and
squelch as described in Sections 3.4.1 and 3.4.2.
With conventional operation, also set the squelch as
described in Section 3.4.6.
2. Select the system and group of the mobile being
called as described in Section 3.4.5.
3. If a conventional call is being placed, monitor the
channel manually or automatically as described in
the preceding section.
4. The microphone PTT (push-to-talk) switch must be
pressed (and held) to talk and released to listen.
Operation with LTR and conventional systems is as
follows:
LTR Operation
• If the proceed tone is enabled, it sounds when the
system is successfully accessed. The proceed tone
(and other tones) can be disabled if desired by the
Tones menu parameter (high tier only) or by
programming (see Section 3.5.17).
• If all repeaters are busy, the busy tone sounds (see
Section 3.10) and “BUSY” is indicated on the
lower line of the display (high tier only). If the
PTT switch continues to be pressed, the system is
accessed when it becomes available.
• If an out-of-range condition exists, the intercept
tone sounds and “OUT-RNGE” is indicated on
the lower line of the display (high tier only). No
more access attempts are made when this indica-
tion appears. Drive closer to the radio system or
away from shielding structures and try again.
• When responding, busy or out-of-range condi-
tions may also occur as when placing a call
because the system is accessed for each
transmission.
Conventional Operation
• If the channel is busy and the Transmit Disable
On Busy feature is programmed (see Section
3.9.2), “DSBL BSY” is indicated on the lower
line of the display (high tier only), the busy tone
sounds, and the transmitter is disabled.
• Otherwise, busy and out-off-range conditions are
not indicated (see Section 3.4.7) and speaking can
begin when the PTT switch is pressed. If the
proceed tone is enabled, it indicates when
speaking can begin but does not indicate that a
repeater has been successfully accessed (see
Section 3.5.13).
5. When the call is finished, place the microphone
back on-hook.
Receiving a Standard Call
1. Turn transceiver power on and set the volume and
squelch as described in Sections 3.4.1 and 3.4.2.
2. Select or scan (see Section 3.7) the system and
group programmed for the call you want to receive.
3. When the message is received, take the microphone
off-hook and press the PTT switch to talk and
release it to listen. If scanning, a response may not
automatically occur on the group of call. Refer to
Section 3.7.4 for more information.
3.4.9 PLACING AND RECEIVING TELEPHONE
CALLS
The procedure for placing LTR telephone calls is
described in Section 3.8.5. If telephone calls can be