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MM-012099-001, Rev. B
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8.23.2 Sending a Telephone Interconnect Call
8.23.2.1 Pre-Stored Number
Use the following procedures to initiate and complete a Telephone Interconnect call.
1. P5470 Model: To select a previously stored phone number, press the
key. Use the or
buttons to scroll through the list of stored numbers.
P5450 Model: To select a previously stored phone number, press the
key. Use the or
buttons to select the menu option PHN CALL. Press the key again then use the or
buttons to scroll through the list of pre-stored numbers.
2. Press and release the PTT button. When the radio is clear to transmit,
turns ON, turns OFF and
the channel access tone sounds. Line one shows the accompanying name selected from the list of
stored numbers. The message *PHONE* appears on line two of the display. The radio then
automatically transmits the programmed number stored in the special call queue.
3. A telephone ring will be heard from the speaker. When someone answers the phone, press the PTT
button and speak into the microphone. Release the PTT button to listen to the callee. Unsuccessful
interconnect signaling returns the radio to the normal receive mode and the number remains displayed
until the special call is cleared or the time-out expires or another group or system is selected.
Terminate a call by pressing the
button.
In half-duplex mode, only one person may talk at a time. The radio PTT button needs
to be pressed in order to communicate to the individual called and released for the
individual called to be heard.
8.23.2.2 Direct Dialing of Phone Calls (P5470 Model Only)
1. If the phone number is not stored in the pre-stored list of phone numbers, but the phone number is
known, it can be entered directly from the keypad. Start by pressing the
key, then enter the
required number from the keypad. Press and release the PTT button.
The last number directly entered can be recalled by first pressing then pressing the
PTT button.
2. A telephone ring can be heard from the speaker. When someone answers the phone, press and hold
the PTT button and speak into the microphone. Release the PTT button to listen to the individual
called. Unsuccessful interconnect signaling returns the radio to the normal receive mode and the
number remains displayed until the special call is cleared or the time-out expires or another group or
system is selected.
3. To terminate the call, momentarily press the
button.
8.23.3 Dual-Tone Multi-Frequency: Overdial/Conventional Mode
Once the radio has established a connection to the public telephone system, it may be necessary to “over-
dial” more digits to access banking services, answering machines, credit card calls, or other types of
systems that require Dual-Tone Multi-Frequency (DTMF) access digits.