Specifications

Chapter 7 – Call-Related Commands
Multi-Tech Systems, Inc. AT Commands for EDGE (E1) Modems (S000474A) 106
7.23 AT^SLCC Extended List of Current Calls
Description: AT^SLCC covers essentially the same information as AT+CLCC, with the following additions:
• The execute command response contains an additional parameter <traffic channel
assigned> indicating whether the call has been assigned a traffic channel by the network
and transmission of DTMF tones is possible.
• The additional write command allows to activate Event reporting for the list of current calls. If
event reporting is active for an interface, a call status transition (see Call Status Information)
and (if desired) the assignment of a traffic channel will generate an event report indication to
this interface. In order to receive this event report as an URC, the URC presentation mode
for this interface has to be configured with AT+CMER.
• The additional read command returns an indication as to whether event reporting is active.
Remember that the URC will be displayed only if the URC presentation mode for the
interface concerned has been configured with AT+CMER.
• The exec command returns a list of current calls. If command is successful, but no calls are
available, no information response is sent to TE.
Syntax: Test Command: AT^SLCC=?
Response: ^SLCC: (list of supported<n>s)
OK
Read Command: AT^SLCC?
Response: ^SLCC: <n>
OK
Exec Command: AT^SLCC
Response: [^SLCC:<idx>, <dir>, <stat>, <mode>, <mpty>, <traffic channel
assigned>[, <number>,<type>[, <alpha>]]]
[^SLCC:<idx>, <dir>, <stat>, <mode>, <mpty>, <traffic channel
assigned>[, <number>,<type>[, <alpha>]]]
[^SLCC:...]
OK
ERROR
+CME ERROR: <err>
Write Command Syntax: AT^SLCC=[<n>]
Response: OK
ERROR
+CME ERROR: <err>
Unsolicited Result Code: Unsolicited Call Status information
if the list of current calls is empty:
^SLCC:
if one or more calls are currently in the list:
^SLCC: <idx>, <dir>, <stat>, <mode>, <mpty>, <traffic channel assigned>[,
<number>, <type>[, <alpha>]]
[^SLCC: <idx>, <dir>, <stat>, <mode>, <mpty>, <traffic channel assigned>[,
<number>, <type>[, <alpha>]]]
[... ]
^SLCC:
URC “^SLCC” displays the list of current calls as displayed with the execute command
AT^SLCC. The list is displayed in the state it has at the time of display, not in the state it
had when the signal was generated.
The URC’s occurrence indicates call status changes for any of the calls in the list of
current calls.
Please refer to Call Status Information and AT^SCFG for further information about the
configuration of this URC.
Event reporting can be enabled separately for each interface. Interface settings are saved
with AT&W and can be displayed with AT&V. Additionally, The URC presentation mode
for the interface must be configured with AT+CMER.
Depending on the value of AT^SCFG setting <sucs>, Indicator “^SLCC” will be issued (if
configured with write command AT^SLCC and AT+CMER):
• when a state transition ends in state “active” or in state “unknown” (if AT^SCFG
setting <sucs>=”restricted”)