Aastra Telecom 53I - Manual (Page 6)

vi RN-001029-00, Rev 03, Release 2.1
Contents
Other Interoperability Features .................................................................................. 109
DNS Caching .......................................................................................................... 109
Symmetric UDP Signaling Support ......................................................................... 109
Configuring Symmetric UDP Signaling Using Configuration Files.................... 110
Ability to Remove UserAgent and Server SIP Headers .......................................... 111
Configuring UserAgent/Server SIP Headers .................................................... 111
Issues Resolved on Series 5i Phones in Release 2.1, Build 2145 .......................... 112
Contacting Aastra Telecom Support .......................................................................... 115