Specifications

Chapter 7 – Call-Related Commands
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371B) 87
• when a state transition ends in state “active” or in state “unknown” (if AT^SCFG
setting <sucs>=”restricted”)
• 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 AT^SCFG setting <sucs>=”verbose”).
If multiple displays of identical list configurations occur, this happens because of short
intermediate states of the list, that have already been overridden by new transitions
and states. Thus, it is guaranteed that the configuration displayed is always the
current configuration at the time of the last display.
The list of active calls displayed with this URC will always be terminated with an
empty line preceded by prefix “^SLCC: “, in order to indicate the end of the list.
Parameter Descriptions:
<idx>
This number can be used in AT+CHLD command operations
<n>
0 presentation of URC “^SLCC” disabled. Default.
1 presentation of URC “^SLCC” enabled
<dir>
0 mobile originated call (MOC)
1 obile terminated call (MTC)
<stat>
state of the call
0 active
1 held
2 dialing (MOC)
3 alerting (MOC)
4 incoming (MTC)
5 waiting (MTC)
6 terminating: The call is not active anymore, but inband information is still available.
7 dropped: The call has been suspended by the network, but may be resumed later.
<mode>
bearer/teleservice
0 voice
1 data
2 fax
3 voice followed by data, voice mode (only in connection with single numbering scheme AT+CSNS)
4 alternating voice/data, voice mode (only in connection with single numbering scheme AT+CSNS)
5 alternating voice/fax, voice mode (only in connection with single numbering scheme AT+CSNS)
6 voice followed by data, data mode (only in connection with single numbering scheme AT+CSNS)
7 alternating voice/data, data mode (only in connection with single numbering scheme AT+CSNS)
8 alternating voice/fax, fax mode (only in connection with single numbering scheme AT+CSNS)
9 unknown
<mpty>
0 call is not one of multiparty (conference) call parties
1 call is one of multiparty (conference) call parties
<traffic channel assigned>
0 No traffic channel is available to the call
1 mobile has been assigned a traffic channel. It is now possible to send or receive inband information; e.g., to
send DTMF tones (cf. AT+VTS) or to receive network announcements.
<number>
phone number in format specified by <type>
<type>
type of address octect
145 dialing string <number> includes international access code character ‘+’
129 otherwise
<alpha>
Alphanumeric representation of <number> corresponding to the entry found in phonebook; used character set
should be the one selected with command AT+CSCS (Select TE Character Set).
The maximum displayed length of <alpha> is 16 characters. If <alpha> has more than 16 characters, only the
first 15 characters will be displayed. To indicate an overflow, a special character will be used as the 16
th
character. This will be a space if the character set selected with AT+CSCS is ‘GSM’, or ‘E400’ if the character set
is ‘UCS2’.
Due to time constraints on the necessary evaluation of the phonebook, this parameter may show a default value
during early call phases (e.g., for <stat>= “dialing”, “incoming” or “alerting”), even if a phonebook entry is present
for the number concerned.