E.F. Johnson Company 98xx LOW TIER, Руководство по эксплуатации

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LTR FEATURES
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system within range. This feature is either enabled or disabled with all
LTR telephone calls by programming (it is not user selectable). If this
feature is enabled and an out-of-range condition is encountered, it is auto-
matically selected when the PTT switch is released. A short tone sounds
to indicate that this mode is selected.
The transceiver then attempts to access, in succession, other LTR
channels (systems) that are programmed for telephone calls. A beep
sounds as each is accessed, and each is accessed only once. If a channel is
successfully accessed, it is selected and a dial tone sounds. The telephone
call must then be placed within a few seconds or normal operation
resumes. If no channel could be accessed, the intercept tone sounds, the
displayed channel does not change, and the feature deactivates. This
mode can also be canceled at any time by pressing any front panel switch.
Transpond
The transpond feature indicates if the mobile being called is in
service. To be available, it must be programmed in the transceiver you are
calling. Each selectable LTR channel (group) can be programmed for this
feature. If a call is received on one of these channels, the transceiver auto-
matically transmits a response. This causes the transceiver placing the
call to briefly unsquelch and the call indicator to turn on (if it is
programmed on the selected channel).
Priority and Block ID Codes
Fixed priority and block receive ID codes may be programmed with
LTR operation. Calls on these ID codes are received in addition to calls
on the selected decode ID code (see “LTR Operation” on page 29). If a
call is detected on a priority ID code, it interrupts other calls. For
example, if a call is detected on a priority code while listening to a call on
the selectable decode code, the transceiver immediately switches to the
priority call. Telephone calls are not interrupted by priority calls.
When a call is detected on a priority ID code, the transceiver checks
the other LTR channels to see if any have the same ID code. If a match is
found, it temporarily or permanently changes to that channel, depending