An approach to Call Park/Retrieve using SIP
CITEL Technologies Ltd
Call Park and Call Retrieve are useful telephony services that are normally found on traditional PBXs. Implementing these services using the Session Initiation Protocol (SIP) in the way described in the SIP Service Examples draft [1] is straightforward, but suffers from a useability problem when implemented using SIP User Agents resembling traditional business telephones. This draft discusses a simple extension to cater for this style of endpoint.