Aastra 53i Release Note page 120

IP Phone Release Notes 2.1
Issues Resolved on Series 5i Phones in Release 2.1, Build 2145
Issue Number Description of Fix
CLN06182 Mute key now works when the phone is locked. This enables the user to "answer"
and intercom call, which automatically mutes the voice path.
DEF06632 57iCT: No longer automatically answers a second call when the user hangs up on
the first call.
SIP
CLN06064 Username containing a "." are now supported.
CLN06444 Phone now correctly follows the setting of the "sip cancel after blind transfer"
parameter.
CLN06502 Phone now treats "600: Busy Everywhere" responses for an outgoing call as a busy
indication, rather than a failed call.
DEF04481 VLAN tagged ARP packets now get to Port 1 as expected.
DEF04982 Early media call now works correctly; 200 OK no longer ignored.
DEF05265 When TCP is selected for the transport, "transport=tcp" is now added to the contact
header/req URI of SIP messages.
DEF06630 Referred-By header is now added to the INVITE message from Tranferee.
DEF07268 Fixed a rare phone lockup caused by excessive SIP messages caused by
configuring large numbers of BLF/List keys.
ENH04263 Support for server redundancy now works correctly.
ENH07192 Phone now unsubscribes to BLF and BLF/List services when they are removed via
the Web interface.
114 RN-001029-00, Rev 03, Release 2.1