ADTRAN 3000 - Manual (Page 125)

Appendix B. Status Buffer Messages
61203153L2-20 Express 3000 User Manual B-11
TXINIT expired
Bonding timer TXINIT expired; called non-BONDING equip-
ment.
UNASSIGNED_NUMBER
The phone number dialed does not exist.
Unknown AT cmd
User issued an unknown AT command.
USER_ALERT_NO_ANS
Ringing call is not answered.
USER_BUSY
The dialed number is busy.
V120 connected
The V.120 rate adaption successfully connected to the far-end
unit.
V120 Timeout
V.120 negotiation failed.
WRONG_MESSAGE
Call control error.
WRONG_MSG_FOR_STATE
Call control error.