Aastra Telecom 67XXI manual Issue Number Description of Fix DEF19446, DEF19454, DEF19455, DEF19466

IP Phone Release Notes 2.5.3

Issues Resolved in Release 2.5.3

Issue Number	Description of Fix
DEF19446	When a phone receives an INVITE, the user accepts the call (ACK) and the phone sends an OK
	response. If the Call Manager sends a Re-INVITE before the ACK, the phone freezes.
	This is now corrected.
DEF19454	If the phone is set to use Secure Real-Time Transport Protocol (SRTP) with a setting of "SRTP
	Preferred" mode, and in a non-SRTP session the phone receives a re-INVITE with Session
	Description Protocol (SDP) containing a crypto key, the phone answers with an OK response
	containing no crypto key in SRTP. The peer sends SRTP but the phone cannot decrypt it (since it's
	not in SRTP-mode). Phone sends unencrypted RTP.
	On a re-INVITE the phone now sets the local SDP. If there is a change involving the crypto key, the
	change is now included in the OK response.
DEF19455	When a re-INVITE with no SDP comes into a phone with an on-hold call, the phone doesn’t respond
	with its Codec list and crypto key.
	This is now corrected.
DEF19466	When a 67xxi phone is communicating with another 67xxi phone using SRTP for voice,
	communication works correctly. However, after approximately 20 minutes of communication, the line
	goes silent with no audio, even though SRTP packets are still being exchanged.
	This is now corrected.
DEF19588	When the phone registered to the primary server, static TLS authentication performed as expected
	(phone used trusted certificate to validate server certificate). When the primary server failed and the
	phone performed a failover to the backup registrar, the certificate for the backup registrar was signed
	by the same root CA but the phone refused the certificate with “unknown CA”.
	This has now been corrected and the phone now accepts the applicable certificate(s) from the
	backup registrar.
ENH17750	Previously, the IP Phones did not parse Session Description Protocol (SDP) Annex B attribute when
	using a G.729AB codec. This caused an interoperability issue.
	The phone now fully supports the G.729 Annex A and Annex B.
ENH17935	A phone enabled with Link-Layer Discovery Protocol (LLDP) does not set the VLAN ID when
	receiving an LLDP frame containing Type-Length-Values (TLV) which sets the data and VLAN ID
	from the switch.
	The IP Phones now accept LLDP frames and the phones set the VLAN ID correctly.
ENH19694	The default Network Time Protocol value on the IP Phones is now set to “aastra.pool.ntp.org.” This
	resolves some issues with certificate validation.
DEF20397	Network Packet Loss Rate (NLR) values provided by phone were missing fractional values and
	rounding was not always done correctly.
	This is now corrected. NLR values now contain fractions if they exist and rounding is done correctly.
Usability
DEF18026	If the “Switch UI Focus to Ringing Line” parameter is disabled, and two calls come into the phone
	at the same time (Line 1 and Line 2), when the User picks up the call on Line 1, a ringing is heard in
	the handset from Line 2.
	This is now corrected. A User no longer hears ringing in the handset when picking up the first Line.

6 RN-001029-04, Release 2.5.3, Rev 05