Specifications

Chapter 7 – Call-Related Commands
Multi-Tech Systems, Inc. AT Commands for EDGE (E1) Modems (S000474A) 99
<cn>
Call Number
The “call number” is an optional index into the list of current calls available via AT+CLCC. AT command
AT^SHUP will terminate the call identified by the specified call number. The default call number “0” is not
assigned to any call, but signifies “all calls”. As “0” is the default value, it may be omitted.
With AT^SHUP, Calls will be terminated regardless of their current call status, which may be any of the states
allowed by AT+CLCC.
0 Terminate all known calls. Default value if the parameter is omitted (0 will be assumed).
1...7 Terminate the specific call number <cn>
Notes:
• It depends on the network whether or not a delivered release cause will be forwarded to the remote party.
• With AT^SHUP, calls will be terminated regardless of their current call status, which may be any of the states
allowed by AT+CLCC.
• This command is PIN protected;
• This command is not supported in airplane mode.
7.12 ATS0 Set Number of Rings before Automatically
Answering a Call
Description: This command determines the number of rings before automatic answering a call.
Syntax: Read Command: ATS0?
Responses: <n>
OK
ERROR
Write Command: ATS0=<n>
Responses: OK
ERROR
Parameter Description:
<n> This value can be stored with AT&W
This value can be displayed with AT&V
000 Automatic answer mode is disabled. Default (This is the factory default value and can be
restored to '000' with AT&F
001-255 Enable automatic answering after specified number of rings.
Notes:
• This command works for MT data calls.
• Auto answering of CSD data calls is supported on ASC0 only.
• If <n> is set to higher values, the calling party may hang up before the call is automatically answered.
• The correlation between ATS7 and ATS0 is important. Example: Call setup may fail if ATS7=30 and ATS0=20.
• Setting is local to the interface. It is allowed to have different settings on different interfaces. In such cases the
interface ‘wins’, which is idle and uses the smallest <n> value.
• According to "3GPP TS 27.007 (GSM 07.07): AT command set for User Equipment (UE)", ATS0 is also used as
GPRS compatibility command to answer automatically to a network request for PDP context activation (see
Section 11.21). Therefore, when the ATS0 write command is issued with <n> greater than 0, the ME will attempt
to perform a GPRS attach if not yet attached and if configured to do so (due to the setting
AT^SCFG="GPRS/ATS0/withAttach","on").
If the automatic GPRS attach fails the ME keeps trying to attach for approx. 5 minutes, before ATS0 ends up with
"ERROR" or "+CME ERROR: unknown", though the new <n> value takes effect. To avoid the risk of long
response times to ATS0 in such case take care that the parameter AT^SCFG=<gs0aa> is off, if autoanswer
mode is not needed for GPRS or if the mobile works in non-GPRS networks.
The GPRS attach will not be performed on recalling a stored user profile with ATZ or on power up, even though a
value <n> greater than 0 was stored in the user profile with AT&W.
• This command is PIN protected.
• This command is not supported in airplane mode.