AASTRA 51i User Guide

Model 51i IP Phone User Guide  67

Call Forwarding

The call forwarding feature on the IP phone allows incoming calls to be forwarded to 
another destination. The phone sends the SIP message to the SIP proxy, which then 
forwards the call to the assigned destination.
Phone-side Call forwarding is disabled by default. You can enable call forwarding on 
a global basis only using the IP Phone UI or the Aastra Web UI.
For global call forwarding, you can set the following:

• Call forward mode
• Destination number
• Number of rings before forwarding the call (from 1 to 9 rings)

The following are the call forward modes you can set.

Off
(Aastra Web UI only)

Disables call forward 

All

Phone forwards all incoming calls 
immediately to the specified 
destination.

Busy

Phone forwards incoming calls if the 
line is already in use.

No Answer

Phone forwards the call if it is not 
answered in the specified number of 
rings

Busy No Answer

Phone forwards the call if either the 
line is already in use or the call is not 
answered in the specified number of 
rings.