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WCDMA Module
13
3
Call control commands and methods
3.1 ATD\ATA\ATH\ATS0
V.250 [14] dial command D lists characters that may be used in a dialling string for making a call or
controlling
supplementary services in accordance with 3GPP TS 22.030 [19]. Their use in GSM/UMTS is listed in
this subclause,
as well as new dial modifiers applicable only to GSM/UMTS are introduced. For a MT supporting AT
commands only,
it is mandatory to support the control of supplementary services in accordance with 3GPP TS 22.030
[19] through the
dial command or through the specific supplementary service commands (+CCFC, +CLCK, etc.),
where 3GPP TS 22.030
[19] identifies the supplementary services as mandatory.
V.250 dialling digits
1 2 3 4 5 6 7 8 9 0 * # + A B C (implementation of these characters is mandatory for GSM/UMTS)
D (implementation of this character is optional for GSM/UMTS, and it is ignored)
V.250 modifier characters
, (implementation of this character is mandatory for GSM/UMTS, but it may be ignored)
T P (implementation of these characters is mandatory for GSM/UMTS, but they are ignored)
! W @ (implementation of these characters is optional for GSM/UMTS, and they are ignored)
V.250 semicolon character
In GSM/UMTS, when semicolon character is given after dialling digits (or modifiers), a voice call
originated to the
given address. TA returns to command state immediately (or after poCOLP result code; refer
subclause
"Connected line identification presenCOLP"). Refer Annex G for a detailed example.
GSM/UMTS modifier characters
> (refer subclause "Direct dialling from phonebooks")
I or i (override the CLIR supplementary service subscription default value for this call; I = invocation
(restrict CLI
presentation) and i = suppression (allow CLI presentation); refer subclause "Calling line identification
restriction
+CLIR")
G or g (control the CUG supplementary service information for this call; uses index and info values set
with command
+CCUG; refer subclause "Closed user group +CCUG")
3.2 +CSTA Select type of address
Description
Set command selects the type of number for further dialling commands (D)
according to GSM/UMTS specifications.
Test command returns values supported a compound value.