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MH120 Wireless Telephone 2-7
Mobile Handset 120 and Desktop Charger/Gang Charger User Guide - Revision 1
The Call Period
The two-way radio operates on the concept of a push-to-talk session or
call period. The push-to-talk call period begins with the first
transmission and ends when there has been no two-way radio traffic on
the channel for 10 seconds.
The PTT mode controls the keypad during a push-to-talk call period.
Therefore, it is not possible to use the keypad for any other function,
such as accessing the on-hook menus or accessing an OAI application.
However, it is possible to place a PBX call (see below).
Initiating Calls
Press the Talk button and wait two seconds to activate the channel
before talking. The “start transmit” sound will play when you may begin
talking.
Transmitting Calls
Use the following steps to transmit calls.
Step 1 Initiate a call. Talk into the microphone while holding the Wireless
Telephone two inches from your mouth.
Step 2 Release the Talk button when finished talking. The “end transmit” sound
plays.
The MH120 Wireless Telephone then enters the waiting state where it
monitors the channel for up to 10 seconds.
Step 3 (Optional) To initiate subsequent transmissions on the MH120 Wireless
Telephone, press the Talk button, using the same channel. The “start
transmit” sound plays immediately and the user can start talking. The
display screen shows the current active channel. Since all phones on
that channel are already in the receive state, there is no two-second
delay.
If no transmission occurs during the 10-second countdown period, the
MH120 Wireless Telephone plays the “end call” sound and reverts to the
idle state.
Receiving Calls
When a PTT transmission is received the phone plays the “receiving
alert” sound and enters the receive state.
In this state the phone receives all conversations on the selected
channel. The phone ignores the Talk key while in the receive state. The
screen shows the current active channel, the caller ID information of the
CAUTION
If you inadvertently press any other button or key on the Wireless Telephone while
transmitting a call, the call will be terminated.