User manual

AT Command Set
MC35_ATC_01_V05.00 Page 71 of 256 15.07.2002
<class> integer or sum of integers each representing a <class> of informa-
tion:
1 voice
2 data
4 fax
8 short message service
16 data circuit sync
32 data circuit async
64 dedicated packet access
128 dedicated PAD access
x combination of some of the above classes.
For example, the default setting 7 represents the sum of
the integers 1, 2 and 4 (CF for voice, data and fax). The
value 255 covers all classes. If the <class> parameter is
omitted, the default value 7 is used.
<time> time to wait before call is forwarded, rounded to a multiple of 5 sec..
1...20..30 (only for <reas>=no reply)
<status> 0 not active
1 active
Reference
GSM 07.07,
GSM 02.04,
GSM 02.82
Note
· Please note that you can register, disable, enable and erase <reas>
4 and 5 as described above. However, it is not possible to query the status
of <reas> 4 and 5 with AT+CCFC. Instead, you may use the ATD com-
mand followed by *'# codes to check the status of these two reasons. See
Chapter 9.4 for a complete list of *# GSM codes. See also examples be-
low.
· The AT+CCFC command offers a broad range of call forwarding options
according to the GSM specifications. However, when you attempt to set a
call forwarding option which is not provisioned or not yet subscribed to, the
setting will not take effect regardless of the response returned. The re-
sponses in these cases vary with the network (for example “OK”, “Opera-
tion not allowed”, “Operation not supported” etc.). To make sure check the
call forwarding status with <mode>=2.
· <class> 2 (data) comprises all those <class> values between 16 and 128,
that are supported both by the network and the MS. This means, a setting
made for <class> 2 applies to all remaining data classes (if supported). In
addition, you can assign a different setting to a specific class. For exam-
ple, you can activate Call Forwarding for all data classes, but deactivate it
for a specific data class.
· The command has been implemented with the full set of <class> parame-
ters according to GSM 07.07. For actual applicability of SS “call forward-
ing” to a specific service or service group (a specific <class> value) please
consult table A.1 of GSM 02.04.
4.6.1 Examples: Call forwarding
Please note that when you configure or query call forwarding without specifying any classes, the set-
tings will refer to classes 1, 2 and 4 only (=default). The handling of classes is equivalent to AT+CLCK
(Chapter 4.21.3).
Example 1
To register the destination number for unconditional call forwarding (CFU):
at+ccfc=0,3,"[phone]",145
OK