Service manual

OPERATION
3-31
April 2001
Part No. 001-9800-203
Repeated access attempts are made while the PTT
switch is pressed with this tone sounding. Therefore, it
is not necessary to release the PTT switch to access the
system.
Intercept Tone - This is a siren-like tone (alternating
high and low tones) consisting of 700 Hz and 800 Hz
tones alternating at approximately a 2 Hz rate. This
tone indicates the following out-of-range and error
conditions:
• Out-Of-Range - If this tone sounds 2-3 seconds after
pressing the PTT switch and “OUT RNGE” is
displayed, the data handshake with the repeater
could not be completed. The usual cause is an out-
of-range condition. Six attempts are made before
this tone sounds. No more access attempts are then
made until the PTT switch is released and then
pressed again.
• Time-Out Timer - If this tone sounds after the trans-
mitter has been keyed for an extended period and
“TIMEOUT” is displayed, the transmitter has been
disabled by the Time-Out Timer feature (see Section
3.5.16). This tone sounds in all operating modes.
Ten seconds before this tone sounds, a single high
beep (1400 Hz) sounds to indicate that time-out will
soon occur.
• Transmit Inhibit - If this tone sounds as soon as the
PTT switch is pressed with an LTR system selected
and “TX INHIB” is displayed, the transmitter has
been disabled by the Transmit Inhibit feature (see
Section 3.8.6).
• Transmit Disable On Busy - If this tone sounds as
soon as the push-to-talk switch is pressed with a
conventional group selected and “DSBL BSY” is
displayed, the channel is busy and the transmitter
was disabled by the Transmit Disable On Busy
feature (see Section 3.9.2).
• Receive-Only Channel - If “TX DSBL” is displayed
when this tone sounds, a conventional receive-only
channel is selected (see Section 3.9.3).
• Tx While Receiving Call - If the push-to-talk switch
is pressed while receiving an LTR call, this tone
sounds and “DSBL BSY” is displayed.
Proceed (Clear-To-Talk) Tone - This is a short (700
Hz, 50 ms) tone which sounds after the push-to-talk
switch is pressed to indicate when talking can begin
(see Section 3.5.13).
Key Press Tone - This is a short (700 Hz, 50 ms) tone
that sounds to indicate when an option switch is
pressed (in all modes). It is also used to confirm that
the System Search mode has been selected.
Priority Call Tone - This is a 1050 Hz, 50 ms tone
that sounds when a call is received on a conventional
first or second priority channel (see Section 3.9.6).
Wrap-Around Tone - A 700 Hz, 80 ms tone followed
by an 800 Hz, 80 ms tone which indicates that the
highest or lowest programmed system or group was
displayed and that wrap-around has occurred (see
Section 3.4.5).
Error Tone - A 1050 Hz, 80 ms tone followed by a
700 Hz, 80 ms tone which indicates that an error
condition occurred.
3.10.2 LTR TELEPHONE CALL TONES
The following tones are generated by the LTR
interconnect equipment and are heard when making
LTR telephone calls.
Reorder Tone - Three beeps which indicate that the
call has been terminated by the system.
Return Time Warning Tone - Two beeps which warn
that you have not transmitted for an extended period.
If you do not transmit within 5 seconds, the call is
automatically terminated by the system. The time
between transmissions is one of the parameters used
by the system to detect the end of a call when the #
character is not sent.
Conversation Time-Out Tone - Calls are limited to a
certain length by the system. Thirty seconds before
this time is reached, a “tick” begins sounding each
second. When the 30-second time expires, the call is
automatically terminated by the system.
Turn-Around Tone - This is a single beep which may
be used to indicate to the landside party when to
respond to your transmission. It sounds when you