Service manual

OPERATION
3-24
April 2001
Part No. 001-9800-203
priority calls. The priority order of the decode ID
codes is as follows:
1. Fixed Priority ID Code 1
2. Fixed Priority ID Code 2
3. Selectable ID Codes
4. Block ID codes
For example, if a call is being received on select-
able group 4 and a call is detected on fixed priority ID
2, the call on group 4 is immediately dropped and the
transceiver switches to the call on fixed priority ID 2.
With high tier models only, when a call is detected on
fixed priority ID code 1, “PRIORTY1” is indicated on
the bottom line of the display. Likewise, when a call is
received on priority ID 2, “PRIORTY2” is displayed.
The selectable ID codes are checked to see if any
are the same. If a match is found, the transceiver
changes to that group. If no match is found, it does not
change and a response cannot be made using that ID
code. When a call is received on a block ID code,
“BLK CALL” is displayed on the bottom line but the
display does not change.
If a change to a selectable group occurs, the scan
revert mode programming described in Section 3.7.4
determines if the change to the new group is tempo-
rary or permanent and if a transmission occurs on the
new group. In addition, if the change is not permanent,
the programming of the scan delay described in
Section 3.7.3 determines how long the transceiver
stays on the priority group.
With LTR operation, incoming call information is
received on only the home repeater. Therefore, priority
calls are not detected while trunked to some other
repeater. To reach most mobiles with a priority
message in this case, the operator can key the trans-
mitter and then not begin speaking for several seconds.
This allows trunked-out mobiles time to finish the
transmission and return to the home repeater.
This still may not reach mobiles making tele-
phone calls because they hold a repeater for the dura-
tion of a conversation (instead of the duration of the
transmission as with dispatch calls). Other times when
priority calls could be missed are when some other
system not programmed with the priority ID is being
monitored and while transmitting.
Transmit Disable On Block IDs
Each bank can now be programmed so that trans-
mitting is inhibited while a call is being received on a
block ID code. This operation is selected on the
Create/Edit Bank screen by programming “Inhibit
Transmit During Block Decode = Yes”. The trans-
mitter can be keyed immediately after the call is
complete (there is no 5-second delay as with the
transmit inhibit feature). When this parameter is
programmed “No”, the transmitter can be keyed while
receiving a call on a block ID. This feature is available
with operating (Flash) software Version 211 or later,
and programming software version 210 or later.
3.8.4 LTR STANDARD CALLS
LTR standard calls are between mobiles or groups
of mobiles using the standard group ID codes from 1-
250 that are assignable to each LTR home repeater. A
standard call is placed by simply selecting a group
programmed with the ID code of the mobile being
called. No number is dialed as with telephone calls. To
receive a standard call, the mobile must be
programmed to decode the ID code being transmitted.
Refer to Section 3.4.8 for more information on placing
and receiving standard calls.
3.8.5 LTR TELEPHONE CALLS
General
To place and receive LTR telephone calls, the
transceiver must be programmed with a block of tele-
phone ID codes. This block of codes may include from
one ID code up to all 250 ID codes assignable on a
home repeater. When an ID code within this block is
decoded (received) or selected to be encoded (trans-
mitted), the transceiver enters the telephone operating
mode. An optional DTMF microphone is required to
dial the telephone number.
Operation is half-duplex which means that the
PTT switch must be pressed to talk and released to
listen (the same time as with a dispatch call). There-
fore, the mobile user cannot hear the landside caller
while transmitting or speak to the landside caller while
receiving.