Lucent Technologies Host-Based Controller Modem AT Data Addendum page 10

Host-Based Controller Modem
AT Command Set
AT Command Reference (continued)
20. Reason for call ending, only valid after call ends:
0 = Local modem command: ATH, DTR drop
1 = Remote modem: cleardown, loss of signal
2 = No answer, busy, etc.
3 = Training failure V.90, K56flex or V.34.
4 = Protocol failure if required by \N4, for example.
21. For PCM connection only, a hexadecimal 6-bit pattern of T1 frames with robbed-bit signaling.
22. For PCM connection only, the downstream digital loss.
23. For K56flex connection only, the V.8bis info sent by the server. Meaning is defined at the server and by
convention. Example above is from a recent Ascend MAX in -Law.
Ln Monitor Speaker Volume
This command sets speaker volume to low, medium, or high.
L0:
L1:
L2:
L3:
Result Codes:
OK
ERROR
Mn Monitor Speaker Mode
This command turns the speaker on or off.
M0:
M1:
M2:
M3:
Result Codes:
OK
ERROR
Nn Modulation Handshake
This command controls whether or not the local modem performs a negotiated handshake at connection time with
the remote modem when the communication speed of the two modems is different.
N0: When originating or answering, this is for handshake only at the communication standard specified by
S37 and the ATB command.
N1: When originating or answering, begin the handshake only at the communication standard specified by
S37 and the ATB command. During handshake, fallback to a lower speed may occur (default).
Result Codes:
OK
ERROR
10
Selects low volume.
Selects low volume.
Selects medium volume (default).
Selects high volume.
n = 0, 1, 2, 3
Otherwise
The speaker is off.
The speaker is on until the modem detects the carrier signal (default).
The speaker is always on when modem is off-hook.
The speaker is on until the carrier is detected, except while dialing.
n = 0, 1, 2, 3
Otherwise
n = 0, 1
Otherwise
Lucent Technologies Inc.
Data Addendum
June 15, 1998
Version 1.0