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61202.086L1-1 ISU 512 User Manual 85
Appendix C
AT Commands
The AT commands (shown in Table C-A) can be used with the Maintenance
interface available at 9600 bps (8, n, 1) through the CHAIN IN port on the back
panel. See the section The Maintenance Interface in Chapter 3 for more informa-
tion.
Commands should be entered without the AT prefix.
Table C-A
AT Commands
Command Definition Function
A Answer Places the ISU 512 into answer mode
D Dial Precedes the telephone access number [ATD551212]
H Hangup Disconnects the current call
l0 Identify unit Displays model number
l1 - Displays software version
S S-Register -
SS S String register -
&W - Saves current configuration to EEPROM
Carrier Detect (CD) Control Line options
&C0 - CD forced
&C1 - CD normal
&C2 - CD with local disconnect
&C3 - CD off link down