AL3A-RM User Guide Version B
Document Number: 451-93156-002B
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designed specifically for Iridium products include a –MS prefix. Most extended commands
include three alpha characters after the prefix, but some commands include just one or two
alpha characters after the prefix.
Some extended commands have a single execution mode. No further syntax is added after the
prefix and body of the command. For example,
AT+GSN
is entered as shown to query the A3LA-
RM for its assigned serial number (i.e., IMEI). Some extended commands incorporate a test
mode to query their range of valid responses. Some extended commands incorporate set, read,
and test modes. For example, AT–MSVTR is entered as
AT–MSVTR=n
in set mode to
enable/disable receipt of DTMF messages. It is entered as
AT–MSVTR?
in read mode to query
its current setting and is entered as
AT–MSVTR=?
in test mode to query its range of valid
settings. Extended commands are grouped as shown below.
Extended Cellular Commands
:
+C prefix
Used for GSM cellular phone-like functions
Standards: ETSI specifications GSM 07.07 [2] and GSM 07.05 [3]
Extended Data Compression Commands
:
+D prefix
Used for data compression
Standard: V.25ter [1]
Extended Generic Commands
:
+G prefix
Used for A3LA-RM issues such as identities and capabilities
Standard: V.25ter [1]
Extended Interface Control Commands
:
+I prefix
Used to control the DTE interface
Standard: V.25ter [1]
