/mcpC H A P T E R 29 Call Forwarding • Call Forwarding Overview, on page 327 • Call Forwarding Configuration Task Flow, on page 329 • Call Forwarding Interactions, on page 346 • Call Forwarding Restrictions, on page 350 Call Forwarding Overview As a user, you can configure a Cisco Unified IP Phone to forward calls to another phone. The following call forwarding types are supported: • Call Forward No Bandwidth—Forwards calls when a call to a directory number fails due to insufficient bandwidth, and provides forwarding functionality to an Automated Alternate Routing (AAR) destination using public switched telephone network (PSTN) as the alternate route or to a voicemail system. • Call Forward with Alternate Destination—Forwards calls when a call to a directory number and the forwarded destination are not answered. The call gets diverted to an alternate destination as a last resort. This Call Forwarding type is also referred to as “MLPP Alternate Party destination.” • Call Forward All (CFA)—Forwards all calls to a directory number. • Call Forward Busy (CFB)—Forwards calls only when the line is in use and the configured Call Forward Busy trigger value is reached. • Call Forward No Answer (CFNA)—Forwards calls when the phone is not answered after the configured No Answer Ring Duration timer is exceeded or the destination is unregistered. • Call Forward No Coverage (CFNC)—Forwards calls when the hunt list is exhausted or timed out, and the associated hunt-pilot for coverage specifies “Use Personal Preferences” for its final forwarding. • Call Forward Unregistered (CFU)—Forwards calls when the phone is unregistered due to a remote WAN link failure, and provides automated rerouting through the Public Switched Telephone Network (PSTN). Calls can also be forwarded based on the type of caller: internal or external. • CFA Destination Override—Forwards calls when the user to whom calls are being forwarded (the target) calls the user whose calls are being forwarded (the initiator). The phone of the initiator rings instead of call forwarding back to the target. Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 327