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Chapter 4 – Voice Commands
Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C) 120
Command: +VPR=<rate> Select DTE/DCE Interface Rate (Turn Off Autobaud)
Values: 0, 1, 2, 3, 4, 5, 6, 7, 8
Result Codes: OK if the modem accepts the command; ERROR if the <rate> value is out of range.
Description: The +VPR= command causes the modem to select between various fixed modem-to-PC
interface rates and autobauding. The selected fixed interface rate stays in effect until the
modem selects another interface rate or autobauding, or until the modem returns to
autobauding on the expiration of the Inactivity Timer. The newly selected rate takes effect
after the modem returns the OK result code.
+VPR=0 select autobauding
+VPR=1 select 2400 bps
+VPR=2 select 4800 bps
+VPR=3 select 7200 bps
+VPR=4 select 9600 bps
+VPR=5 select 12000 bps
+VPR=6 select 14400 bps
+VPR=7 select 16800 bps
+VPR=8 select 19200 bps
If the modem claims support for autobauding (+VPR=0), it means that the modem can
accept AT commands at 2400 bps at all times while in Voice command mode and with
+VPR=0.