Aastra Telecom 675xi Series 사용자 설명서

4

RN-001029-03, Release 2.4.1, Rev 01 

IP Phone Release Notes 2.4.1

This section provides a new feature in SIP IP Phone Release 2.4.1. This new feature applies to 
all of the Aastra IP Phones, unless specifically stated otherwise. The feature also specifies 
whether it affects the Administrator, the User, or both.

Release 2.4.1 provides a new feature that allows an Administrator to shorten the length of a SIP 
packet by using the compact form. This feature is in accordance with Compact SIP Headers 
defined in RFC 3261.

For example, the following SIP header is the long format:

Via: SIP/2.0/UDP 
10.50.91.2:5060;branch=z9hG4bK571ebe0c;rport=5060;received=10.50.91.2
From: "Unknown" <sip:Unknown@10.50.91.2>;tag=as19d00fc8
To: <sip:1106@10.50.110.54:5060;transport=udp>;tag=916699998
Call-Id: 73cad5456806f3a7768d17e8617279d7@10.50.91.2
CSeq: 102 OPTIONS

(For Administrators)

Release 2.4.1 provides a new feature that allows an 
Administrator to shorten the length of a SIP packet by 
using the compact form. This feature is in accordance 
with Compact SIP Headers defined in RFC 3261.

(For Administrators)

Release 2.4.1 includes support for a additional code 
types. Now using the Aastra Web UI or the configuration 
files, an Administrator can select from up to 14 codecs 
for the phones AND customize a codec preference list of 
up to 10 codecs. Silence suppression can still be enable 
or disabled as required.