Cisco Systems SPA3102 manual Voice Gateway, Re-registration with Primary SIP Proxy Server

Voice Gateway with Router
Voice Gateway	SIPv2: Session Initiation Protocol v2 (RFC 3261, 3262, 3263, 3264)
	SIP Proxy Redundancy - Dynamic via DNS SRV, A Records
	Re-registration with Primary SIP Proxy Server
	SIP Support in Network Address Translation Networks - NAT (incl. STUN)
	Secure (Encrypted) Calling via Pre-Standard Implementation of Secure RTP
	Codec Name Assignment
Voice Algorithms	G.711 (A-law and µ-law)
	G.726 (16/24/32/40 kbps)
	G.729 A
	G.723.1 (6.3 kbps, 5.3 kbps)
	Dynamic Payload
	Adjustable Audio Frames per Packet
Fax Capability	T.38 Fax
	Fax Tone Detection and Pass-Through (Using .711)
	Fax Pass-Though - Using G.711
	DTMF: In-band & Out-of-band (RFC 2833) (SIP Info)
	Flexible Dial Plan Support with Interdigit Timers and IP Dialing
	Call Progress Tone Generation
	Jitter Buffer - Adaptive
	Frame Loss Concealment
	Full Duplex Audio
	Echo Cancellation (G.165/G.168)
	VAD - Voice Activity Detection with Silence Suppression
	Attenuation / Gain Adjustments
	Flash Hook Timer
	MWI - Message Waiting Indicator Tones

74 Appendix E: Specifications