Service manual

OPERATION
2-20
November 2001
Part No. 001-7240-001
Mobile Disable, and Reassignment are originated by
the system operator or a dispatcher. Special LTR-Net
calls use the special call group ID codes from 240-254.
A telephone-type keypad and special programming are
required to place special calls. More information on
these calls follows.
Telephone (Telco) - These are interconnect calls to or
from a mobile made through the Public Switched Tele-
phone Network (PSTN).
Auxiliary - These calls allow a mobile to communicate
with specific mobiles or groups at the same locality
(site) or another LTR-Net locality when several LTR-
Net repeater systems form a network. Calls to specific
mobiles are called Unique ID calls, and calls to specific
groups are called Directed Group calls.
Directed Group calls allow communication with
groups that are otherwise not accessible because no
selectable system has been programmed with the home
repeater or group ID of those mobiles. Directed Group
calls can be made to any home repeater on any group
ID code from 1-239.
Transceiver Programming For Special Calls
To originate a special call and then respond, the
selected group must be programmed for the special
call being made (Telephone or Auxiliary). The
programming software automatically loads the correct
ID codes for these calls. Refer to the following chart
for more information.
To receive Telephone and Unique ID calls and
then respond, a group must be programmed for the
applicable call (Telephone or Auxiliary). However,
this group usually does not need to be selected or
scanned. Refer to Section 2.8.2 for more information.
The Directed Group call is received as a standard
group call because it is converted to that type by the
switch. Therefore, a group programmed with the ID
specified by the originating mobile must be selected or
scanned or be assigned to a higher priority group.
To receive landside originated telephone calls, the
transceiver must be programmed for telephone calls
even though the unique ID of the mobile may be speci-
fied when placing the call (see “Landside-Originated
Calls” which follows).
With all special calls, the scan revert program-
ming described in Section 2.6.10 also determines if
transceiver does not change or changes temporarily or
permanently to the group of the call.
Special Call Authorization
When a mobile is programmed to make Tele-
phone calls, system authorization is needed before
service is available. This authorization is performed by
the system operator through the System and
Subscriber Manager, and it determines what type of
service is available. For example, a mobile may be
authorized to dial local numbers only. This authoriza-
tion is keyed to the mobile’s unique ID which is trans-
mitted when any call is made.
Authorization is also required to make auxiliary
calls. Unique ID calls can be made to any mobile in
the same locality (site) or some other locality that is
programmed for Auxiliary calls. The same applies to
Directed Group calls except that the mobile receiving
the call does not need to be programmed for Auxiliary
calls, just the standard group ID being transmitted.
Placing a Special Call
The following is the procedure for placing a
special call. These calls require that a number be
dialed using the front panel keypad.
1. Select an LTR-Net system programmed for the
special call being made.
2. If placing a telephone call, select the dial mode and
a telephone group by pressing FCN PHONE (see
Section 2.7).
Type of Call
Originating Mobile
Encode/Decode ID
Receiving Mobile
Decode/Encode ID
Telephone Telephone Telephone
Auxiliary
Unique ID Auxiliary Auxiliary
Dir Group Auxiliary Group ID