Specifications

3GPP
3GPP TS 27.007 V6.3.0 (2003-
06)
5
7
Release 6
This is based on the GSM/UMTS supplementary services HOLD (Call Hold; refer 3GPP TS 22.083 [5] clause 2),
MPTY (MultiParty; refer 3GPP TS 22.084 [22]) and ECT (Explicit Call Transfer; refer 3GPP TS 22.091 [29]). The
interaction of this command with other commands based on other GSM/UMTS supplementary services is described in
the GSM/UMTS standards.
NOTE: Call Hold, MultiParty and Explicit Call Transfer are only applicable to teleservice 11.
It is recommended (although optional) that test command returns a list of operations which are supported. The call
number required by some operations shall be denoted by "x" (e.g. +CHLD: (0,1,1x,2,2x,3)).
Defined values
<n>: integer type; equals to numbers entered before SEND button in 3GPP TS 22.030 [19] subclause 6.5.5.1
NOTE: The "directory number" case shall be handled with dial command D, and the END case with hangup
command H (or +CHUP). The 4*"directory number" case is handled with +CTFR command.
Implementation
Optional.
7.14 Call deflection +CTFR
Table 47: +CTFR action command syntax
Command
Possible response(s)
+CTFR=<number>[,<type>[,<subaddr>[,<satype>]]]
+CME ERROR: <err>
+CTFR=?
Description
This refers to a service that causes an incoming alerting call to be forwarded to a specified number. Action command
does this. Refer subclause 9.2 for possible <err> values.
This is based on the GSM/UMTS supplementary service CD (Call Deflection; refer 3GPP TS 22.072 [30]). The
interaction of this command with other commands based on other GSM/UMTS supplementary services is described in
the GSM/UMTS standards.
NOTE: Call Deflection is only applicable to teleservice 11.
Defined values
<number>: string type phone number of format specified by <type>
<type>: type of address octet in integer format (refer TS 24.008 [8] subclause 10.5.4.7); default 145 when dialling
string includes international access code character "+", otherwise 129
<subaddr>: string type subaddress of format specified by <satype>
<satype>: type of subaddress octet in integer format (refer TS 24.008 [8] subclause 10.5.4.8); default 128
Implementation
Optional.
7.15 Unstructured supplementary service data +CUSD
Table 48: +CUSD parameter command syntax
Command
Possible response(s)
+CUSD=[<n>[,<str>[,<dcs>]]]
+CME ERROR: <err>
+CUSD?
+CUSD: <n>