AC International MTA128ST-USB manual Result Codes

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 result codes, which can be displayed on your monitor or intercepted and used by your communications 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. 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
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.

71