Configuring Advanced Features
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2. Select Enabled from the pull-down list of Hide Feature Access Codes.
3. Click Confirm to accept the change.
Shared Call Appearance (SCA)
SCA allows users to share an extension which can be registered on two or more IP phones at the
same time. For more information on how to register accounts, refer to Account Registration on
page 165. If you want to customize multiple DSS keys to associate with an account, refer to
Multiple Line Keys per Account on page 172.
Any IP phone can be used to originate or receive calls on the shared line. An incoming call can
be presented to multiple phones simultaneously. The incoming call can be answered on any IP
phone but not all. A call that is active on one IP phone will be presented visually to other IP
phones that share the call appearance.
IP phones support SCA using a SUBSCRIBE/NOTIFY mechanism as specified in RFC 3265. The
events used are:
“call-info” for call appearance state notification
“line-seize” for the IP phone to ask to seize the line
SCA supports the IP phones barging in an active call. In addition, SCA has the call pull capability.
Call pull feature allows users to retrieve an existing call from another shared phone that is in
active or public hold status.
If the call is placed on public hold, the held call is available for any shared party to retrieve. If the
call is placed on private hold, the held call is only available for the hold party to retrieve. You
need to configure either the private hold soft key or a private hold key before you place the call
on private hold.
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