Specifications

3GPP
3GPP TS 27.007 V6.3.0 (2003-
06)
4
2
Release 6
6.25 ITU-T V.250 [14] call control commands
Table 32: V.250 call control commands
Command
Subclause
Impl.
Use in GSM/UMTS
D[<dial_
string>][;]
6.3.1
mand.
originates a call
T
6.3.2
mand.
ignored (select tone dialling)
P
6.3.3
mand.
ignored (select pulse dialling)
A
6.3.5
mand.
answer a call
H[<value>]
6.3.6
mand.
hang-up a single mode call; for alternate mode call refer subclause
"Hangup call +CHUP" (only value equal to zero needed)
O[<value>]
6.3.7
mand.
returns TA to online data state from online command mode (only value
equal to zero needed)
S0=[<value>]
6.3.8
mand.
sets the number of call indications (rings) before automatically
answering the call; value equalling zero disables automatic answering
and is the default
S6=[<value>]
6.3.9
mand.
ignored (pause before blind dialling)
S7=[<value>]
6.3.10
mand.
sets number of seconds to wait for completion of call answering or
originating procedure before giving up and disconnecting
S8=[<value>]
6.3.11
mand.
sets number of seconds to wait when comma dial modifier encountered
in dial string of D command (default is 2 seconds)
S10=[<value>]
6.3.12
mand.
sets number of tenths of seconds to wait before disconnecting after TA
has indicated the absence of received line signal
L[<value>]
6.3.13
mand.
ignored (monitor speaker loudness)
M[<value>]
6.3.14
mand.
ignored (monitor speaker mode)
6.26 ITU-T V.250 [14] data compression commands
Table 33: V.250 data compression commands
Command
Subclause
Impl.
Use in GSM/UMTS
+DS=[<dir>[,<neg>
[,<P1>[,<P2>]]]]
6.6.1
mand.
when
V.42bis
controls ITU-T Recommendation V.42bis data compression
functions; for subparameter defaults in GSM/UMTS refer
3GPP TS 24.022 [18]
+DR=[<value>]
6.6.2
mand.
when
V.42bis
determines whether the use of V.42bis is informed using
intermediate result code +DR: <type> before going
online data state after call answering or originating
6.27 Informative examples
The alternating mode call handling (voice and fax, or voice and data) and the data call setup commands are defined such
that the dialling command of V.250 [14] (D) still always originates a call. The purpose is to support all current TE
applications using the dialling command as default. Fax calls are controlled following the rules of ITU-T T.31 [11] and
T.32 [12] standards.
An example where a voice call is originated:
ATD+1 812 555673I; (type of address defaults to 145, CLI presentation is restricted for this call)
OK (call setup was successful)
An example where a voice call is attempted from a phonebook:
ATD>"Doe Joe"G; (enable CUG control for this call)
+CME ERROR: 22 (entry "Doe Joe" is not found)
Also supplementary services may be controlled using dial command according to 3GPP TS 22.030 [19]. An example of
call forwarding on no reply for telephony with the adjustment of the no reply condition timer on 25 seconds: