ZyXEL P-2302RL User Guide - Page 43
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P-2301/2R-P1C / P-2301RL-P1C User's Guide 9 Features Voice Functions Protocol Support SIP (RFC 3261) version 2 SDP (RFC 2327) RTP (RFC 1889) RTCP (RFC 1890) G.168 Echo Cancellation VAD (Voice Activity Detection) Silence Suppression CNG (Comfort Noise Generation) QoS Supports ToS and Diffserv Tagging Compression: G.711 (PCM), G.729 (ADPCM) Loop Start Signaling Support Modem and Fax Tone Detection and Pass Through DTMF Detection Point to Point Calling (Direct IP to IP Calling) Speed Dial Phonebook PSTN Line Support (Prestige P-2302RL-P1) Support NAT Traversal / RFC 3489- IETF Simple Traversal of UDP Through NAT (STUN) Caller ID Dialing Type: Tone, Pulse (Auto detection) Tip/ring polarity reversal PPP over Ethernet (RFC 2516) Transparent bridging for unsupported network layer protocols. DHCP Client 43