You are able to transfer calls even if all your current call appearance buttons are in use.

1.Press Transfer. The current call is automatically put on hold pending transfer.
2.Dial the number for the transfer. Alternatively, press Dir to select a destination from the directory or use the Redial option, if applicable.
To complete the transfer, press Complete. You can do this while the call is still ringing.
Transferring a call while it is still ringing is called an unsupervised transfer.
Transferring a call after ringing finishes is called a supervised transfer.
If the transfer destination does not answer or, after answering the call, does not want to accept the call, press the Cancel soft key.
3.Press Complete to complete the transfer. If the transfer destination does not answer or does not want to accept the call, press the Cancel soft key.

Notes

Calls and Button Status Indication
The status indication for a call on hold pending transfer differs from that used for standard held calls:
On phones with dual lamp buttons, both the green and red lamps fast flash (flutter) when the button represents a call on hold pending transfer.
On phones with single lamp buttons or status icons, Xfer: is shown in front of the caller ID information rather than the button name. For example Xfer:Extn299 is shown rather than a = Extn299.
The call status information shown when a call on hold pending transfer is highlight is prefixed with On-Hold-Xfer rather than On-Hold.
Switching Between Calls
Switching from a connected call to an existing call on hold pending transfer puts the connected call on hold pending transfer.