Filter
Top Products
MM-014716-001
70
9.13 TELEPHONE INTERCONNECT CALLS
9.13.1 Receiving a Telephone Interconnect Call (Trunked Mode Only)
Receiving a telephone interconnect call is identical to receiving an individual call. See the DTMF
Overdial Operation section if access to services requiring "over-dial" is needed. Overdial operations are
available for any special call whether it is an individual call or a telephone interconnect call.
9.13.2 Sending a Telephone Interconnect Call (Trunked Mode Only)
Use the following procedures to initiate and complete a Telephone Interconnect call:
1. To select a previously stored phone number, select phone call mode from the menu, press PHN and
use the
ramp control to scroll through the list of stored phone numbers. The selection mode
rules apply. While in the phone call list, the MENU key will toggle the display between the phone
call name and the phone call number. If the phone number is not stored in this list but the phone
number is known, it can be entered directly from the keypad. If necessary, a pause can be entered by
pressing and holding 0-9, (*), or (#) until an underscore appears in the display.
2. Press and release the PTT button; the radio performs the necessary signaling to obtain a
communication channel. When the signaling is complete and the radio is clear to transmit, TX
indicator turns on and the channel access tone sounds. Line 1 shows the accompanying name if
selected from the list of stored numbers or the phone number if entered directly. The message
*PHONE* is displayed on line 2. The radio then automatically transmits the programmed number
stored in the special call queue.
3. Telephone ringing will be heard. When someone answers the phone, press the PTT button and speak
into the microphone. Release the PTT button to listen to the caller. Unsuccessful interconnect
signaling returns the radio to the normal receive mode and the number remains displayed until the
special call is cleared by pressing the CLR button or the time-out expires or another group or system
is selected.
4. To terminate the call, momentarily press the CLR button.
The M7300 Series mobile radio is capable of half-duplex conversation only. The
caller’s message can only be sent if the PTT button is pressed (the radio is
transmitting) and the caller can only be heard by the person being called when the PTT
is released (the radio is receiving).
9.13.3 DTMF Overdial/Conventional Mode Telephone Interconnect
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 DTMF (Dual-Tone Multi-Frequency) access digits. Overdial operation can also be
used to initiate a telephone interconnect call via DTMF signaling if a dial tone has already been accessed
on the system. This is the method that is used for making a telephone interconnect call while operating in
the conventional mode but will also function in trunked mode if a dial tone is directly accessible.
Telephone numbers and other number sequences for overdialing can be stored in the phone list when
programming the radio or stored by the operator in the first ten phone list entries. These numbers are
accessed by pressing PHN then following the selection mode rules.
The following steps are required to dial these numbers: