Chapter 4 – Voice Commands
Multi-Tech Systems, Inc. SocketModem MT5600SMI/MT5656SMI Reference Guide (S000306C)
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Voice Configuration Commands
Command: +FCLASS=8 Select Voice Mode
+FCLASS=8 selects the Voice Mode. The Voice Mode commands and
responses described in this section are applicable when command
+FCLASS=8. (See the Generic Modem Control section for the
definition of the FCLASS command.)
Command: +VNH
Automatic Hang-up Control
This command enables or disables automatic hangups.
Syntax:
+VNH=<hook>
Defined Values:
<hook> Decimal number corresponds to the selected option (Table 2-4).
0 The modem enables automatic hangups as is normal in other modes.
1 The modem disables automatic hangups usually found in the other
non-Voice Modes.
2 The modem disables automatic hangups in the other non-Voice
Modes. The modem performs only a “logical” hangup (returns to OK
result code).
Table 4-4. +VNH Command Behavior
Command Response
Command
No Carrier
Present
ATH
ATZ
DTR & D2
+VNH=0 Y Y Y Y
+VNH=1 N Y Y Y
+VNH=2 N N N Y
Notes:
Y= will hang-up; N= will not hang-up.
How +VNH is reset:
DTE uses +VNH command to change setting.
DTE issues aFCLASS mode change without issuing aVNH.
A hang-up event occurs (see this table).
DTE VIP command.
Reporting Current or Selected Values:
Command:
+VNH?
Response:
<hook>
Example: 0 For the default setting.
Reporting Supported Range of Parameter Values:
Command:
+VNH=?
Response: (<hook> range)
Example:
(0-2)
Result Codes:
OK <hook> = 0-2.
ERROR
Otherwise.