Pico Macom M7100 12.9 TELEPHONE INTERCONNECT CALLS

12.9 TELEPHONE INTERCONNECT CALLS

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.

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

p and use the RAMP controls, , or ., to scroll through the list of stored phone

numbers. The selection mode rules apply. While in the phone call list, the m 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 c button or the time-out expires

or another group or system is selected.

4. To terminate the call, momentarily press the c button.

The M7100IP 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).

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