Aastra 9143i Series Administrator's Manual page 682

IP Phone Administrator Guide
About this chapter
Topic
Blacklist Duration
Whitelist Proxy
Transport Layer Security (TLS)
802.1x Support
Symmetric UDP Signaling
Removing UserAgent and Server SIP Headers
GRUU and sip.instance Support
Multi-Stage Digit Collection (Billing Codes) Support (for Sylantro
Servers)
Configurable DNS Queries
Ignore Out of Sequence Errors
"Early-Only" Parameter in Replaces Header RFC3891
Reason Header Field in SIP Message
Configurable "Allow" and "Allow-Event" Optional Headers
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41-001160-03 Rev 00, Release 2.5