1vv0301515 Rev.1
Page 23 of 59
2018-07-18
GSM Single Numbering Scheme
Most Network Operators use a primary phone number associated to the voice service and a
secondary phone number to data and fax. If the Operator employs a GSM Single Numbering
Scheme, the voice and data number is the same.
To select the bearer to be used when a mobile terminated Single Numbering Scheme call is
established, use the following AT command.
AT+CSNS=[<mode>]
Test command returns the supported bearers or teleservices
AT+CSNS=?
+CSNS: (0-7)
OK
Example 1
Read command returns the current bearer
AT+CSNS?
+CSNS: 0
voice (factory default)
OK
An Incoming Call is recognized:
RING
RING
ATA
voice channel is on
Example 2
Read command returns the current bearer
AT+CSNS=4
data
OK
An Incoming Call is recognized:
RING
RING
ATA
data channel is on
