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Command
Description
A
Answer an incoming call.
D
Initiate an ISDN call.
H
Hang-up a call.
O
Return back to online mode from AT command
mode.
AT Result Codes
The following codes may be returned after an AT command is executed. Depending upon the value of the
message format configuration parameter, either the numeric or verbose message will be displayed. The set-
tings of the Carrier/Protocol Result Codes and the Connect Messages parameters may also keep some of the
messages from being displayed.
Numeric
Text Message
Code
0
OK
2
RING
3
NO CARRIER
4
ERROR
6
NO DIALTONE
7
BUSY
17
CONNECT 56000
19
CONNECT 64000
79
PROTOCOL PPPC
96
CHANNEL B1
97
CHANNEL B2
EXTender 3000 System Administrator's Guide (Definity)
A - AT Command Set
Table 28: Terminal Adapter Action Commands
Table 29: AT Results Codes
Description
The command line was successfully executed.
An incoming call has been detected (this may
appear at any time in AT command mode and not as
the result of executing an AT command).
No carrier was detected when trying to place a call.
An error was encountered in the AT command line.
Commands to the left of the erroneous command
were executed.
No dial tone was detected when trying to place a
call.
The called number was busy or the second EXT-
3000t B channel was already in use for a POTS call.
A connection was established at 56 Kbps.
A connection was established at 64 Kbp.
The PPP protocol is in use on the connection.
The call was established using the B1 channel.
The call was established using the B2 channel
Values
NA
'0'-'9', '(', ')', '-', ';', ','
For backwards compatibility the
D may be followed by P, T, or W
NA
NA
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