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SIM900 AT Commands Set

5 all conditional call forwarding

<mode>

0 disable

1 enable

2 query status

3 registration

4 erasure

<number> string type (Phone number of forwarding address in format

specified by <type>)

<type> Type of address

<subaddr> string type (subaddress of format specified by <satype>)

<satype> type of sub-address in integer

<class> 1 voice (telephony)

2 Data (refers to all bearer services; with <mode>=2 this may

refer only to some bearer service if TA does not support

values 16, 32, 64 and 128)

Fax (facsimile services)

7 all classes

<time> 1..30 When "no reply" is enabled or queried, this gives the time in

seconds to wait before call is forwarded, default value is

20.Supported only if it is multiples of 5.

0 - not active

1 - active

Reference

GSM07.07

Note

3.2.6 AT+CCWA Call Waiting Control

AT+CCWA Call Waiting Control

Read Command

AT+CCWA?

Response

+CCWA: <n>

Test Command

AT+CCWA=?

Response

+CCWA: (list of supported <n>s)

Write Command

AT+CCWA=<n>[,

<mode>[,<class>]]

Response

TA controls the Call Waiting supplementary service. Activation,

deactivation and status query are supported.

SIM900_ATC_V1.01 51 23.06.2010

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