ZyXEL P-2302HWL-P1. Routing protocols: PPPoE, SNTP, TCP/IP, VoIP protocols: SIP v2 (RFC3261), DNS SRV, SDP (RFC 2327), RTP (RFC1889), RTCP (RFC1890). Filtering: Java/ActiveX/Cookie/Keyword, NAT functionality: - STUN (RFC 3489) - Outbound Proxy - Manual configured SIP and RTP. Certification: FCC, CE. Operating temperature range (T-T): 0 - 40 °C, Storage temperature range (T-T): -30 - 60 °C, Operating relative humidity range: 20 - 95 %. Weight: 0.437 kg