ADTRAN L128 - Manual (Page 136)

Appendix A: Loop Status Messages
61202.070L1-1 Express L128/L128T User Manual 119
Register SPID #1
The Express L128/L128T’s ISDN layer 1 and 2 is up and is now registering
SPID 2 with the ISDN network.
RINGING
An incoming call is ringing.
B1 and B2 Bearer Channel Status Messages
56K
Connected at 56K call type.
64K
Connected at 64K call type.
Audio
Connected at audio call type.
Dialing
Dialing out.
Holding
Connection is on hold.
Idle
No call up.
Speech
Connected at speech call type.
Release
Call being hung up.
Retriv
Held call being retrieved.
Ringing
Incoming call.