Specifications

Chapter 9 – Supplementary Service Commands
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371B) 116
9.9 AT+CLIP Calling Line Identification
Presentation
Description: This command refers to the GSM supplementary service CLIP (Calling Line Identification
Presentation) that enables a called subscriber to get the calling line identity (CLI) of the
calling party when receiving a mobile terminated call.
Test Command Syntax: AT+CLIP=? The test command returns values supported by the TA as a compound
value.
Response: +CLIP: (list of supported<n>s)
OK
Read CommandSyntax: AT+CLIP? The read command gives the status of <n>, and also triggers an interrogation
of the provision status of the CLIP service according GSM 02.81 (given in <m>).
If no SIM card is available or SIM-Pin isn’t entered, the command response is “ERROR”.
Response: +CLIP: <n>, <m>
OK
ERROR
+CME ERROR: <err>
Write Command: AT+CLIP=<n> The write command enables or disables the presentation of the CLI at
the TE. It has no effect on the execution of the supplementary service CLIP in the
network.
Response: OK
ERROR
+CME ERROR: <err>
Parameter Descriptions:
<n>
0 Suppress unsolicited result codes. Default
1 Display unsolicited result codes
<m>
0 CLIP not provisioned
1 CLIP provisioned
2 unknown
<number>
string type phone number of calling address in format specified by type.
<type>
type of address octet in integer format; 145 when dialing string includes international access code character “+”,
otherwise 129.
<alpha>
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 AT+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. Number
shall be an empty string (“”) and type value will not be significant.
When CLI is not available ( <CLI validity>=2), number shall be an empty string (“”) and type value will not be
significant. Nevertheless, TA shall return the recommended value 128 for type (TON/NPI
unknown in accordance with GSM 04.08 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 GSM 02.81 and GSM 03.81), number and type is provided. Otherwise, TA shall return the
same setting for number and type as if the CLI was not available.
Unsolicited Result Codes:
URC 1
Voice call response format:
+CLIP: <number>, <type>, , [, <alpha>][, <CLI validity>]
URC 2
Data/FAX call response format:
+CLIP: <number>, <type>
When CLIP is enabled at the TE (and is permitted by the calling subscriber), an unsolicited result code is
returned after every RING (or +CRING: <type>) at a mobile terminating call.