Appendix E: AT Commands
49
Command
Function
%E0
Disables line-quality monitoring and auto-retraining
%E1
Enables monitoring and retraining
%E2
Enables monitoring and fallback/fall forward
%E3
Enables monitoring, retraining, and fast hang up
%L
Reports received signal level in -dBm
%Q
Reports line signal quality
\A0
64-character maximum MNP block size
\A1
128-character maximum MNP block size
\A2
192-character maximum MNP block size
\A3
256-character maximum MNP block size
\B
n
In non-error correction mode, transmits line break to remote
modem in 100 ms units (1-9 with 3 as default)
\G0
Disables XON/XOFF (modem-to-modem) flow control
\G1
Enables XON/XOFF (modem-to-modem) flow control
\K
n
Defines break type
\N0
Normal data link with speed buffering; no error correction
\N1
Selects serial interface; same as &Q0
\N2
Selects reliable (error correction) mode (first LAPM, then
MNP)
\N3
Selects auto-reliable mode (LAPM, MNP, Normal)
\N4
LAPM error correction only
\N5
MNP error correction only
\V=0
Disables Single Line Connect Message
\V=1
Enables Single Line Connect Message, where the format is:
CONNECT <DTE speed></Modulation></Protocol>
</Compression></Line speed>
-SDR=0
Disables Distinctive
Ring.
Ring
Type
Cadence
-SDR=1
Enables Type 1
1
2 sec. ON, 4
-SDR=2
Enables Type 2
sec. OFF
-SDR=3
Enables Type 1 and 2
2
0.8 sec. ON, 0.4
-SDR=4
Enables Type 3
sec. OFF, 0.8
sec.
-SDR=5
Enables Type 1 and 3
ON, 4 sec. OFF
-SDR=6
Enables Type 2 and 3
3
0.4 sec. ON, 0.2
-SDR=7
Enables Type 1, 2, and 3
sec. OFF, 0.4
sec.
ON, 0.2 sec.
OFF,
0.8 sec. ON, 4
sec. OFF
