Service manual

OPERATION
2-29
November 2001
Part No. 001-7240-001
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 no access and error
conditions:
• No Access - If this tone sounds 2-3 seconds after
pressing the PTT switch and “NO ACESS” 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 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
2.4.11). This tone sounds in all operating modes.
• 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 2.8.4).
• Receive-Only Group - If “TX DSBL” is displayed
when this tone sounds, a receive-only group is
selected (see Section 2.4.10).
Proceed (Clear-To-Talk) Tone - This is a short (700
Hz, 50 ms) or a distinctive (three beep) tone which
sounds after the handshake is complete to indicate
when talking can begin (see Section 2.4.9).
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).
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 2.3.5).
Error Tone - A 1050 Hz, 80 ms tone followed by a
700 Hz, 80 ms tone which indicates that an error
condition occurred.
2.12.2 LTR-NET SPECIAL CALL TONES
NOTE: The following tones are produced by the LTR-
Net switch and are heard only when placing special
calls.
Confirmation Tone - A short tone which sounds
when the number just dialed is accepted by the system.
Call Proceed Tone - With LTR-Net Directed Group
calls, ringing does not occur after the number is dialed.
Instead, this short tone sounds after the confirmation
tone to indicate that the audio path is complete and
speaking can begin.
End Call Tone - Three beeps which sound when the
end of the call has been detected by the system.
Proceed Dialing Tone - When placing a landside-
originate call to a mobile, the caller may dial the
number of the system and then when the system
answers, a number specifying the mobile being called.
This tone sounds to indicate when the number of the
mobile should be entered (see Section 2.9.2).
2.12.3 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