ts_127007v110800p

3GPP TS 27.007 version 11.8.0 Release 11
34
ETSI TS 127 007 V11.8.0 (2013-10)
Voice/ fax call (teleservice number 61)
Figure 6 shows the commands to start the call, to switch between modes (In-Call Modification) and to hang up the call.
+CMOD and +FCLASS commands indicate the current settings before dialling or answering command, not that they
shall be given just before D or A command. The parameter "x" of +FCLASS command can be 1, 1.0, 2 or 2.0.
NOTE 2: The transition from fax mode to voice mode is for further study.
MT voice first
+CRING: ALT VOICE/FAX
AT+CMOD=1;+FCLASS=x
MO
AT+CMOD=1
AT+FCLASS=x
MT fax first
+CRING: ALT FAX/VOICE
AT+CMOD=1;+FCLASS=x
ATA
ATDxxx;
ATDxxx
ATA
VOICE
ATD or
remote initiated
FAX
AT+CHUP or
remote initiated hangup
(or ATH
or drop DTR)
refer ITU-T T.31 [11] and T.32 [12]
for different hangup possibilities
(also AT+CHUP shall hangup)
HANGUP
TA sets +CMOD=0
Figure 6: Alternating voice and fax call
6.7 Select bearer service type +CBST
Table 14: +CBST parameter command syntax
Command
+CBST=[[,[,]]]
+CBST
+CBST=
Possible response(s)
+CBST: ,,
+CBST: (list of supported s),(list of
supported s),(list of supported s)
Description
Set command selects the bearer service with data rate , and the connection element to be used
when data calls are originated (refer 3GPP TS 22.002 [1]). Values may also be used during mobile terminated data call
setup, especially in case of single numbering scheme calls (refer +CSNS).
Test command returns values supported as compound values.
Defined values
NOTE:
The default values of the subparameters are manufacturer specific since they depend on the purpose of the
device and data services provided by it. Not all combinations of these subparameters are supported by
GSM/UMTS (refer 3GPP TS 22.002 [1]).
: integer type
0 autobauding (automatic selection of the speed; this setting is possible in case of 3.1 kHz modem and nontransparent
service)
1 300 bps (V.21)
ETSI