Specifications

3GPP
3GPP TS 27.007 V6.3.0 (2003-
06)
5
6
Release 6
<status>:
0 not active
1 active
<number>: string type phone number of calling address in format specified by <type>
<type>: type of address octet in integer format (refer TS 24.008 [8] subclause 10.5.4.7)
<alpha>: optional string type alphanumeric representation of <number> corresponding to the entry found in
phonebook; used character set should be the one selected with command Select TE Character Set +CSCS
<CLI validity>:
0 CLI valid
1 CLI has been withheld by the originator.
2 CLI is not available due to interworking problems or limitations of originating network.
When CLI is not available (<CLI validity>=2), <number> shall be an empty string ("") and <type> value will
not be significant. Nevertheless, TA may return the recommended value 128 for <type> ((TON/NPI unknown in
accordance with TS 24.008 [8] subclause 10.5.4.7).
When CLI has been withheld by the originator, (<CLI validity>=1) and the CLIP is provisioned with the
"override category" option (refer 3GPP TS 22.081[3] and 3GPP TS 23.081[40]), <number> and <type> is provided.
Otherwise, TA shall return the same setting for <number> and <type> as if the CLI was not available.
<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)
<priority>: optional digit type parameter indicating that the eMLPP priority level of the incoming call. The priority
level values are as defined in eMLPP specification 3GPP TS 22.067 [54].
Implementation
Optional.
7.13 Call related supplementary services +CHLD
Table 46: +CHLD action command syntax
Command
Possible response(s)
+CHLD=[<n>]
+CME ERROR: <err>
+CHLD=?
[+CHLD: (list of supported <n>s)]
Description
This command allows the control of the following call related services:
- a call can be temporarily disconnected from the MT but the connection is retained by the network;
- multiparty conversation (conference calls);
- the served subscriber who has two calls (one held and the other either active or alerting) can connect the
other parties and release the served subscriber's own connection.
Calls can be put on hold, recovered, released, added to conversation, and transferred similarly as defined in 3GPP TS
22.030 [19]. Refer subclause 9.2 for possible <err> values.