User Manual

19. SUPPLEMENTARY SERVICES
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LZT 123 7263 R1A
“X” is the numbering (starting with 1) of the call given by the sequence
of setting up or receiving the calls (active, held or waiting) as seen by
the served subscriber. Calls hold their number until they are released.
New calls take the lowest available number. Where both a held and a
waiting call exists, the above procedures shall apply to the waiting call
(i.e. not to the held call) in conflicting situation.
Note! The “directory number” case shall be handled with dial command D,
and the END case with hangup command H (or +CHUP).
19.12 AT+CLIP Calling Line Identification
This command refers to the GSM/UMTS supplementary service CLIP
(Calling Line Identification Presentation) that enables a called
subscriber to get the calling line identity (CLI) of the calling party when
receivinga mobile terminated call. Set 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.
Read command gives the status of <n>, and also triggers an
interrogation of the provision status of the CLIP service according
3GPP TS 22.081 (given in <m>).Test command returns values
supported by the TA as a compound value
2 Places all active calls (if any exist) on hold and accepts
the other (held or waiting) call
2X Places all active calls on hold, except call X with which
communication is supported
3 Adds a held call to the conversation
4 Connects the two calls and disconnects the subscriber
from bothcalls
<n> Description
Description Command Possible Responses
Request calling line
identification
AT+CLIP=<n> • +CME ERROR <err>
•OK
•ERROR
Shows the current
setting
AT+CLIP? •+CLIP:<n>,<m>
+CME ERROR <err>
•OK
•ERROR
Show if the command
is supported
AT+CLIP=? •+CLIP:(listof
supported <n>s)
+CME ERROR <err>
•OK
•ERROR