User`s manual

These are the messages that the CSU/DSU sends to the DTE in response to an AT command. Whether a numeric response
or a word response is sent is determined by the V command. Each response is followed with an ASCII carriage return (Hex
0D) and an ASCII line feed (Hex 0A).
Numeric Word Meaning
0 OK Valid command
1 CONNECT Connection Made
2 RING Incoming ring detected
3 DISCONNECT Call disconnected
4 ERROR Invalid command
5 NO WINK No Wink received from CO
6 NO ANSWER No Answer from far end
The following AT commands respond with an ASCII string terminated with a carriage return and a line feed, followed by a
valid command response (refer to the above responses):
• I
• Sr?
• &T0 (with TP active)