Chapter 1– Introduction
High Speed HSPA-H4 AT Commands Reference Guide (Document S000483A) 10
Summary of GSM/WCDMA Commands Described in
This Document
The following AT Commands (ITU-T Recommendation V.250, 3GPP TS 27.005, and 3GPP TS 27.007) are
supported on the Multi-Tech SocketModem Cell, SocketModem iCell, and MTSMC-H4 Embedded Cellular
Modems. These commands are used to:
• Control serial communications over an asynchronous interface (ITU-T Recommendation V.250)
• Control SMS functions for devices on GSM/WCDMA networks (3GPP TS 27.005)
• Control devices operating on GSM/WCDMA networks (3GPP TS 27.007)
ITU-T Recommendation V.250 AT Commands
The table below indicates whether or not each command is supported on the H4 modems.
Supported commands are described in Chapter 3.
Command Description Supported
&C
Set Data Carrier Detected (Received line signal detector) function
mode
No
&D
Set Data Terminal Ready function mode Yes
&F
Set all current parameters to manufacturer’s defaults Yes
&S
Set DSR signal Yes
&T
Auto tests No
&W
Store current parameter to user-defined profile Yes
+DR
V42bis data compression report Yes
+DS
V42bis data compression Yes
+GCAP
Request complete TA capabilities list Yes
+GMI
Request manufacturer identification Yes
+GMM
Request TA model identification Yes
+GMR
Request TA revision identification Yes
+GOI
Request global object identification No
+GSN
Request TA serial number identification Yes
+ICF
Set TE-TA control character framing Yes
+IFC
Set TE-TA local data flow control Yes
+ILRR
Set TE-TA local rate reporting mode No
+IPR
Set fixed local rate Yes
A
Answer incoming call Yes
D
Dial Yes
D><MEM><N>
Originate call to phone number in memory <MEM> No
D><N>
Originate call to phone number in current memory Yes
D><STR>
Originate call to phone number in memory which corresponds to
alphanumeric field <STR>
No
DL
Redial last telephone number used No
E
Set command echo mode Yes
H
Disconnect existing connections Yes
I
Display product identification information Yes
L
Set monitor speaker loudness No
M
Set monitor speaker mode No
O
Switch from command mode to data mode Yes
P
Select pulse dialing No
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