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P-4
General Description
This feature permits users to originate calls using push button telephones and also allows D
to control external devices requiring DTMF signals to initiate or perform functions (Code-A-Phone, Conference
Unit, etc.).
Operating Procedure
1.
The users press push-buttons corresponding to the desired numbers.
OR
2.
After a connection is established between a D
attached, the D
[S-32D] key to transmit DTMF signals to control the external device.
Service Conditions
1.
If DTMF lines from the Central Office are not available, then the PUSHBUTTON-TO-ROTARY
CONVERSION [P-6] feature must be provided.
2.
Rotary and pushbutton instruments may be used simultaneously with PUSHBUTTON CALLING.
3.
Timing for the DTMF signals can be set from 0.128 to 2.048 seconds via system commands on a system-
wide basis.
4.
DTMF frequency combinations are as follows:
LOW - HIGH
697Hz
770Hz
852Hz
941Hz
Interactions
1.
Each 8RST circuit card contains eight register and eight sender circuits. Each register circuit can accept
either pushbutton or rotary dial pulses. The senders can transmit pushbutton or dial pulse signals and are
also used with the ATTENDANT CONSOLE [A-3], LEAST-COST ROUTING-3/6 DIGIT [L-5], SPEED
CALLING-SYSTEM, STATION, GROUP [S-3, 21, 23], OUTGOING TRUNK QUEUING [O-2], OFF-
HOOK QUEUING [O-7], and PUSHBUTTON-TO-ROTARY CONVERSION [P-6].
2.
Register circuits are located on the first four levels (0-3) and sender circuits are located on the last four
levels (4-7) of the 8RST circuit card.
Programming
STEP 1:
ASYD - System Data 1, Index 128. Register Prepause Timer. How long the register waits for the first
digit. Normally assign data 00H for 12 seconds.
System Data 1, Index 129. Register Inter-digit Timer. How long the register waits between digits.
Normally assign data 00H for six seconds.
NEAX2400 IPX Feature Programming Manual
NDA-24297, Issue 1
Pushbutton Calling
Pushbutton Calling
term
user may press the key pad or SPEED CALLING BUTTONS - ONE TOUCH - D
1,209HZ
term
station and a station or trunk port with an external device
1,336HZ
1
4
7
*
term
stations the ability
1,477HZ
2
5
8
0
P-4
term
3
6
9
#
Page 579
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