Bearer type selection +cbst – Multi-Tech Systems MMCModem GPRS (MTMMC-G) User Manual
Page 93
Chapter 11 – Data Commands
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I)
93
Bearer Type Selection +CBST
Description:
This command applies to both outgoing and incoming data calls, but in a different way. For an outgoing
call, the two parameters (e.g.,
parameter applies.
Notes:
•
For incoming calls, if
T, only and the network offers NT only or vice versa. Then the
call is released.
•
The values 2 and 3 for the
Those values are managed for compatibility purposes, but they should no longer be used in the
new code (2 as former 100 and 3 as former 101).
Values:
0 (default) Autobauding
(modem
type:
none)
1
300 bps
(modem type: V.21)
2
1200 bps
(modem type: V.22)
3
1200/75 bps (modem type: V.23)
4
2400 bps
(modem type: V.22bis)
5
2400 bps
(modem type: V.26ter)
6
4800 bps
(modem type: V.32)
7
9600 bps
(modem type: V.32)
8
Specific
12
9600 bps
(modem type: V.34)
14(*)
1400 bps
(modem type: V.34)
65
300 bps
(modem type: V.110)
66
1200 bps
(modem type: V.110)
68
2400 bps
(modem type: V.110)
70
4800 bps
(modem type: V.110)
71
9600 bps
(modem type: V.110)
75(*)
14400 bps (modem type: V.110)
(*) This speed configures data and fax 14.4 kbps bearers.
0
Transparent only
1 (default)
Non transparent only
2
Transparent preferred
3
Non transparent preferred
Syntax:
Command syntax: AT+CBST=
Command
Possible responses
AT+CBST=?
Note: Test command
+CBST: (0-8,65,66,68,70,71),(0),(0-3)
OK
Note: Data 14,4 kbps not supported
AT+CBST=?
Note: Test command
+CBST: (0-
8,12,14,65,66,68,70,71,75),(0),(0-3)
OK
Note: Data 14,4 kbps not supported
AT+CBST=7,0,1
Note: Ask for a bearer
OK
Note: Bearer supported
AT+CBST?
Note: Current values
+CBST:7,0,1
OK
Note: Command valid
AT+CBST=81,0,0
Note: Ask for a bearer
+CME ERROR: 4
Note: Bearer not supported