
Chapter 10 – +M Prefix Commands
CDMA 1xEV-D0 AT Commands Reference Guide (Document S000482B) 43
+MV18R= V.18 Reporting
Syntax: AT+MV18R=<n>
AT+MV18R? (Queries the settings)
Description: Enables or disables the extended result codes for +MV18R: from the IWF to the modem.
To query the IWF for confirmation that the command is supported, use +GCAP (Get
Capabilities). The +MV18S result must be in that response.
Value Meaning
0 Disables reporting of V.18 result codes. Default.
1 Enables reporting.
The possible intermediate result codes are:
+MV18: 5BIT Indicates connection with 5-bit (Baudot) mode
+MV18: EDT Indicates connection with EDT
+MV18: DTMF Indicates connection with DTMF
+MV18: V21 Indicates connection with V.21
+MV18: V23 Indicates connection with V.23
+MV18: B103 Indicates connection with Bell 103-type modulation
+MV18: V18 Indicates connection with V.18
+MV18S= V.18 Selection
Syntax: AT+MV18S=[m],[ans],[fb]
AT+MV18S? (Queries the settings)
Description: Controls the manner and operation of the V.18 capabilities in the IWF (if present in the
IWF).
To query the IWF for confirmation that the command is supported, use +GCAP (Get
Capabilities). The +MV18S result must be in that response.
Parm Value Meaning
m 0 Disable V.18 operation. Default.
1 V.18 operation, auto detect mode
2 V.18, connect in 5-bit (Baudot) mode
3 V.18, connect in DTMF mode
4 V.18, connect in EDT mode
5 V.18, connect in V.21 mode
6 V.18, connect in V.23 mode
7 V.18, connect in Bell 103-type mode
s 0 Disable V.18 answer operation. Default.
1 No default specified (auto-detect)
2 V.18 operation, connect in 5-bit (Baudot) mode
3 V.18, connect in DTMF mode
4 V.18, connect in EDT mode
fb 0 Disable fallback. Default.
1 Enable fallback to re-acquisition after 2 seconds of no transmission.
The default setting is +MV18S=0,0,0 – meaning V.18 operation is disabled.
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