Time, Status, Obile – Siemens MC55 User Manual

Page 224

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MC55 AT Command Set

9.6 AT+CCFC

obile

MC55_ATC_V01.05

Page 224 of 469

2/10/04

Confidential / Released

5...[20]...30

time to wait before call is forwarded, rounded to a multiple of 5 sec. (only for

=no reply)

Call Forwarding not active

Call Forwarding active

Notes

• You can register, disable, enable and erase

4 and 5 as described above. However, querying the

status of

4 and 5 with AT+CCFC will result in an error ("CME error: Operation not supported"). As

an alternative, you may use the ATD command followed by *'# codes to check the status of these two reasons.
See

List of *# Codes

for a complete list of *# GSM codes. See also examples below.

• Most networks will not permit registration of new parameters for conditional call forwarding (reasons 1,2,3,5)

while unconditional call forwarding is enabled.

• 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 responses in these cases vary with
the network (for example "OK", "Operation not allowed", "Operation not supported" etc.). To make sure check
the call forwarding status with

<mode>

=2.

• Some networks may choose to have certain call forwarding condtions permanently enabled (e.g. forwarding

to a mailbox if the mobile is not reachable). In this case, erasure or deactivation of call forwarding for these
conditions will not be successful, even if the CCFC request is answered with response "OK".

• The command has been implemented with the full set of <class> parameters according to GSM 07.07. For

actual applicability of SS "call forwarding" to a specific service or service group (a specific

<class>

value)

please consult table A.1 of GSM 02.04.

• there is currently no release of GSM standard "GSM 02.04", in which the "Call Forwarding" Supplementary

Service is defined as applicable to SMS services

Example

Please note that when you configure or query call forwarding without specifying any classes, the settings will
refer to classes 1, 2 and 4 only (=default). The handling of classes is equivalent to

AT+CLCK

• To register the destination number for unconditional call forwarding (CFU):

The destination number will be registered for voice, data and fax services (default

<class>

7).

In most networks, the registration will also cause call forwarding to be activated for these

<class>

values.

• To query the status of CFU without specifying

<class>

<time>

(num)