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MC55 AT Command Set
7. Call related Commands
7.
Call related Commands
The AT Commands described in this chapter are related to Mobile Originated (MOC, i.e. outgoing) Calls and
Mobile Terminated (MTC, i.e. incoming) Calls.
7.1
Call Status Information
For Circuit switched calls, including voice, fax and data calls, call status information is available with URC
''"
": call'' (configurable via AT commands
+CIEV
rent calls. This list can be displayed on request via at commands
by the ME in the form of an unsolicited result code "
URC ''"
": call'' and URC "
+CIEV
sible configurations and their consequences for the availability of call status information will be given here.
Generally speaking, the call status values recognized by the ME are as follows:
•
active
•
held
•
dialing (MOC)
•
alerting (MOC)
•
incoming (MTC)
•
waiting (MTC)
•
terminating: The call is not active anymore, but inband information is still available.
•
dropped: The call has been suspended by the network, but may be resumed later.
The values "terminating" and "dropped" are not standardized for AT command
available for command
AT^SLCC
displayed with
.
AT+CLCC
A call that is not recognized by the ME is considered to be in "unknown" state.
Some networks may schedule a traffic channel for a call that is not yet in the "active" state. This is reflected in
parameter
<traffic channel assigned>
Depending on the value of
and
)
AT+CIND
AT+CMER
•
when a state transition ends in state "active" or in state "unknown"
(if
setting
AT^SCFG
<succ>
•
when any state transition (including transitions beginning or ending in state "unknown") occurs in the list of
active calls, or when a traffic channel is established
(if
setting
AT^SCFG
<succ>
The indicator value for indicator ""
otherwise.
Depending on the value of
command
and
AT^SLCC
•
when a state transition ends in state "active" or in state "unknown" (if
•
when any state transition (including transitions beginning or ending in state "unknown") occurs in the list of
active calls, or when a voice channel is established (if
Due to compatibility considerations, the powerup default for
compatibility to the standard behaviour of indicator ''"
bose".
MC55_ATC_V01.05
Confidential / Released
AT+CIND
" can be configured using AT command
^SLCC
. A call in any of these two states will not appear in the list of current calls as
of AT command
setting
AT^SCFG
<succ>
=''restricted'').
=''verbose'').
":call" will be "1" if at least one call is in states "held" or "active", and "0"
+CIEV
setting
AT^SCFG
<sucs>
)
AT+CMER
Page 137 of 469
and
) or - in more detail - from the list of cur-
AT+CMER
and
AT+CLCC
" if configured with
^SLCC
and the corresponding URC.
AT^SLCC
, Indicator "
" will be issued (if configured with
+CIEV
, Indicator "
" will be issued (if configured with write
^SLCC
AT^SCFG
setting
AT^SCFG
<sucs>
setting
AT^SCFG
": call'', while the default for setting
+CIEV
s
m
. It can also be issued
AT^SLCC
and
AT^SLCC
AT+CMER
. An overview of the pos-
AT^SCFG
, and therefore only
AT+CLCC
setting
="restricted")
<sucs>
="verbose").
is "restricted", offering
<succ>
<sucs>
obile
.
is "ver-
2/10/04
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