Operating Manual

March 2008 5100 ES Models II/III Portable Radio Operating Manual 5-9
Conventional Mode Features
If an emergency call is received by the radio on the selected channel, the emergency alarm
ACK tone will sound (5 consecutive tones), and the Emergency Received message will
display, followed by the unit ID of the emergency radio. If any other emergency calls are
made after this initial one using a different radio, the tone will not sound, but the unit ID
will be updated to reflect the most recent emergency call. To exit out of this state, program
a button for “Emergency Clear” and press this. The radio should return to its normal
display, and the Emergency Received message should no longer show.
5.9.3 Emergency Calls
The Emergency Call feature allows a user to place an emergency voice call by pressing the
PTT switch after pressing the Emergency option button or selecting the Emergency menu
parameter. If the Emergency Hot Mic feature is enabled, the emergency call is
automatically transmitted without having to press the PTT switch (see following
description). The system to which the emergency channel is linked must have Emergency
Calls enabled. Analog and Digital (P25) calls can be individually enabled.
If the emergency call is sent on a P25 channel, an emergency indication is sent according
to the P25 standard (the emergency bit is set in the Common Air Interface). If it is sent on
an analog channel, the DTMF Emergency ID is sent in place of the ANI DTMF PTT ID if
applicable.
Note The DTMF Emergency ID is sent only if pre- or post- DTMF ANI is enabled on the
channel by programming.
MDC, Five Tone Signaling, or Single Tone Signaling are sent for Analog Emergency
Calls, depending on the setting of the Emergency Analog Signaling field in PC Configure.
5.9.3.1 Emergency Hot Mic
If Emergency Hot Mic has been enabled for emergency calls, automatic transmitting
occurs with microphone audio unmuted without having to manually press the PTT switch.
The automatic transmit period is programmed for 10-120 seconds in 10-second steps. If
this feature or emergency calls are not enabled by programming, automatic transmitting
does not occur. This feature is initiated only on the first press of the Emergency switch.
Subsequent presses do not trigger automatic transmissions. To reset this function, cycle
power or press and hold the Emergency button.
5.9.3.2 Placing an Emergency Call
1 If required, select a channel of a system on which Emergency Calls are enabled and
press the Emergency option switch or select that menu parameter. The Emergency Call
is then sent as described in
Section 5.9.1 if applicable.