Справочник Пользователя для Aastra Telecom 67XXI

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RN-001029-04, Release 2.5.3, Rev 05 

IP Phone Release Notes 2.5.3

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.

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. 

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.

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.

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.

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.

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.

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.

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.

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.