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P-4
General Description
This feature permits station users to originate calls using pushbutton telephones and also allows D
stations the ability to control external devices requiring DTMF signals to initiate or perform functions (e.g.,
Code-A-Phone, Conference Unit, etc.).
Operating Procedure
1.
The station users press push-buttons corresponding to the desired numbers.
OR
2.
After a connection is established between a D
external device attached, the D
- ONE TOUCH - D
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.
Both 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.
NEAX2400 ICS Business Features and Specifications
NDA-24143, Issue 4
Pushbutton Calling
Pushbutton Calling
term
user may press the key pad or SPEED CALLING BUTTONS
term
[S-32D] key to transmit DTMF signals to control the external device.
1,209Hz
1
4
7
*
term
station and a station or trunk port with an
1,336Hz
2
5
8
0
P-4
term
1,477Hz
3
6
9
#
Page 405
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