Aastra 6757i User Manual page 199

The Expansion Module keys support the following functions:
None Last Call Return (LCR)
Line Call Forward
Speeddial BLF/Xfer
Do Not Disturb (DND) Speeddial/Xfer
Busy Lamp Field (BLF) Speeddial/Conf
BLF/List Directory
Auto Call Distribution (ACD) Callers List
Directed Call Pickup Icom (Intercom)
Extensible Markup Language Services
(XML)
Flash Phone Lock
Sprecode Paging
Park Empty
Pickup
You can configure the keys using the Aastra Web UI at the path, Operation->Expansion Module <N>
when an Expansion Module is attached to the 6757i IP Phone.
Reference
For more information about configuring the expansion module keys with these functions, see the
41-001385-00 Rev 01 – 06.2013
Model M670i and M675i Expansion Modules
"Softkeys" on page 54.
192