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3.3.2 Answer a Call Waiting Call
When an incoming call occurs during an active call, it is referred as a Call Waiting
Call. The user hears an alerting (CAS) tone when a Call Waiting call occurs. For
VoIP calls, this call waiting feature is only available in SIP; H.323 does not support
this. For PSTN calls, the availability of this feature depends on the telephone service
provide.
Press the FLASH key on phone keypad to answer a Call Waiting Call.
3.3.3 Hold a Call
For VoIP, dial the Star Command (the default is *42) to put the active call on hold. To
release the call on hold, dial the Star Command (the default is *42). This feature
applies to VoIP SIP calls only.
For PSTN, use the phone connected to hold/release a call. The Star Command does
not apply to PSTN calls.
This feature applies to VoIP SIP calls only.
3.3.4 Transfer a Call
If two parties ( A and B) are in an active call with each other. Part A can transfer the
call to Party C by dialing the Star Command (the default is *41). The following two
transfer modes are supported.
a) Attended
Transfer
Party A dials *41 to hold the call with Party B and then dials the phone number to call
Party C after hearing a dial tone. After Party C answers the call, Party A can then hang
up to complete the transfer. Party B and Party C will then be connected.
b) Unattended
Transfer
Party A dials the Star Command (the default is *41) to hold the call with Party B and
then dials the phone number to call Party C after hearing a dial tone. Party A can then
hang up the call when hearing a ring back tone. If Party C answers the call, Party C
will then be connected with Party B. If Party C does not answer, Party A’s phone will
then ring after the call to Party C is terminated.
This feature applies to VoIP SIP calls only.