User's Manual

SCAT OPERATION

A SCAT™ (Single Channel Autonomous Trunking) System operates with

same set of features as a standard EDACS system. The only significant user

change relates to the BSY indicator. Since only one channel, operating as both

control and working channel, exists in a SCAT System, the BSY indicator

will be ON when the SCAT channel is in the working channel mode. When

the transmission on the channel is completed, the indicator turns OFF and

indicates the return of SCAT control channel signaling.

TELEPHONE INTERCONNECT CALLS

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.

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

p and use the RAMP control , 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* displays on line 2. The radio then

automatically transmits the programmed number stored in the special call

queue.

3. The 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