Chapter 5 – AT Commands, S-Registers, and Result Codes
Multi-Tech Systems, Inc. SocketModem MT5600SMI Developer’s Guide 30
Data Commands
The modem will respond to the commands detailed below. Parameters app licable to each command are
listed with the command description.

Generic Modem Control Commands

Command: Z Soft Reset and Restore Profile

Description: Causes the modem to perform a soft reset and restore (recall) the
configuration profile. If no value is specified, zero is assumed .
Default: None
Values: Number corresponding to the selected profile:
Z0 Soft reset and restore stored profile 0.
Z1 Soft reset and restores stored profile 1.
Result Codes: OK
Otherwise ERROR

Command: +FCLASS Select Active Service Class

Description: Selects the active service class (mode).
Default: 0
Defined Values: +FCLASS=0 Select Data Mode (Section 3) (Default).
+FCLASS=1 Select Facsimile Class 1 Mode.
+FCLASS=1.0 Select Facsimile Class 1.0 Mode.
+FCLASS=8 Select Voice Mode.
+FCLASS=10 Reserved.
Result Codes: OK
Otherwise ERROR
Report Commands: +FCLASS? Reports Current or Selected Values
+FCLASS=? Reports Range of Parameters

Command: +VCID Caller ID (CID)

Description: Controls the reporting and presentation of data associated with the Caller
ID services in the Incoming Call Line ID (ICLID) data format for the next
call. (U.S. only)
Default: 0
Defined Values: +VCID0 Disable Caller ID reporting.
+VCID1 Enables Caller ID with for matted presentation to the DTE. The
modem presents the data items in a <Tag><Value> pair
format. The expected pairs are date, time, name, and caller
code (telephone number).
+VCID2 Enables Caller ID wit h unformatted presentation to the DTE.
Report Commands: +VCID? Reports the Mode
+VCID=? Reports Range of Parameters

Command: +VRID Report Retrieved Caller ID (CID)

Description: Reports the data associated with the Caller ID services in the Incoming
Caller Line (ICLID) data format for the last received call. U.S. only
Default: None
Defined Values: +VRID0 Reports Caller ID with forma tted presentation to the DTE. The
modem presents the data items in a <Tag><Value> pair
format. The expected pairs are date, time, name, and caller
code (telephone number).
+VRID1 Reports Caller ID with unf ormatted presentation to the DTE.
Report Commands: +VRID? Reports the Mode