BGS2T AT Command Set
7. Call related Commands
BGS2T_ATC_V01.301
Page 137 of 554
1/31/12
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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
and
) or - in more detail - from the list of current
calls. This list can be displayed on request via at commands
. It can also be issued by
the ME in the form of an unsolicited result code "
and
.
URC "
" can be configured using AT command
. An overview of the pos-
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
, and therefore only
available for command
. A call in any of these two states will not appear in the list of current calls as
displayed with
.
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
of AT command
and the corresponding URC.
setting
" will be issued (if configured with
)
•
when a state transition ends in state "active" or in state "unknown"
(if
setting
•
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
=''verbose'').
The indicator value for indicator "
: call" will be "1" if at least one call is in states "held" or "active", and "0"
otherwise.
" will be issued (if configured with write
command
)
•
when a state transition ends in state "active" or in state "unknown" (if
="restricted")
•
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
="verbose").
Due to compatibility considerations, the powerup default for
setting
is "restricted", offering
compatibility to the standard behaviour of indicator "
: call", while the default for setting
is "ver-
bose".
In order to see the URCs, event reporting for both indicators must be explicitly configured with the appropriate
AT commands.
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