AC International MTA128ST-USB Manual De Usuario
71
Chapter 4 - AT Commands, S-Registers, and Result Codes
Result Codes
When the MTA128ST-USB (TA) receives an AT command from the computer or terminal, it attempts to
execute the command, then sends a status message to the computer or terminal that reports the
result of the command. The TA provides you with several of these response messages, or
execute the command, then sends a status message to the computer or terminal that reports the
result of the command. The TA provides you with several of these response messages, or
result
codes, which can be displayed on your monitor or intercepted and used by your communications
software. Using the
software. Using the
V command, you can select whether the result codes are terse (numbers) or
verbose (words).
The TA’s result codes are listed below. Note that the speed of an ISDN channel is always either 56
Kbps or 64 Kbps.
Kbps or 64 Kbps.
Connect messages indicate the speed of the connection between the TA and your
computer or terminal.
TERSE
VERBOSE
DEFINITION
0
OK
TA executed the command without error
1
Connect
TA established an ISDN connection
2
Ring
TA detected a ring caused by incoming call
3
No carrier
TA did not detect carrier within time allotted by S-
Register S7
Register S7
4
Error
Error in the AT command
5
Connect 1200
TA connected at 1200 bps
6
No dial tone
TA has a poor connection to ISDN network
7
Busy
TA detected a busy signal
9
Connect 600
TA connected at 600 bps
10
Connect 2400
TA connected at 2400 bps
11
Connect 4800
TA connected at 4800 bps
12
Connect 9600
TA connected at 9600 bps
14
Connect 19200
TA connected at 19200 bps
28
Connect 38400
TA connected at 38400 bps
56
Connect 56000
TA connected at 56000 bps
64
Connect 64000
TA connected at 64000 bps
P
/PPP
TA using Point-to-Point protocol
T
/V.110
TA using V.110 rate adaption protocol*
V
/V.120
TA using V.120 rate adaption protocol
X
/X75
TA using X.75 rate adaption protocol
* The MTA128ST-USB is manufactured in two builds. To determine the build of your terminal adapter
(TA), issue the ATI2 command in a terminal window. If the TA responds to the command with MTA128ST-
USB, then it supports V.110. If your TA resonds to the ATI2 command with MTA128ST-USB-RC, V.110
support is not available.