Signaling System Diagram And Signal Forms; Circuit Control Signals - Toshiba GD-1210 Service Manual

3.2

Signaling System Diagram and Signal Forms

3.2.1

Circuit control signals

The following circuit control signals are used in the binary and tonal procedures.
• Circuit control signals
CED Called station identification
Indicates that the sender is a FAX machine in the automatic called
mode. (*1)
CNG Calling tone
Indicates that the sender is a FAX machine in the automatic calling
mode. (*1)
*1: This signal can be sent manually.
• Signal form
Signal name
CED
CNG
f
t
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Signal form
f: 2100 ±15 Hz
t: 2.6 - 4.0 sec
f
t
f: 1100 ±38 Hz
t: 0.5 sec ±15%
f
(L: 3 sec)
L
t
3 - 3
Signal form
GD-1210/1250/1270/1160/1260
DIALING/COMMUNICATION CONTROL
3