Đặc tính kỹ thuật
| Model | HT812 |
| Interfaces | |
| Telephone Interfaces | (2) FXS ports |
| Network Interfaces | Two (2) 10/100Mbps auto-sensing ethernet ports (RJ45) |
| LED Indicators | POWER, LAN, WAN, PHONE1, PHONE2 |
| Factory Reset Button | Yes |
| Voice, Fax, Modem | |
| Telephony Features | Caller ID display or block, call waiting, flash, blind or attended transfer, forward, hold, do not disturb, 3-way conference |
| Voice Codecs | G.711 with Annex I (PLC) and Annex II (VAD/CNG), G.723.1, G.729A/B, G.726, iLBC, OPUS, dynamic jitter buffer, advanced line echo cancellation |
| Fax Over IP | T.38 compliant Group 3 Fax Relay up to 14.4kpbs and auto-switch to G.711 for Fax Pass-through |
| Short/Long Haul Ring Load | 3 REN, up to 1km on 24AWG line |
| Caller ID | Bellcore Type 1 & 2, ETSI, BT, NTT, and DTMF-based CID |
| Disconnect Methods | Busy Tone, Polarity Reversal/Wink, Loop Current |
| Signaling | |
| Network Protocols | TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS, DHCP, NTP, TFTP, TELNET, STUN, SIP (RFC3261), SIP over TCP/TLS, SRTP, TR-069 |
| QoS | Layer 2 (802.1Q VLAN, SIP/RTP 802.1p) and Layer 3 (ToS, Diffserv, MPLS) |
| DTMF Method | In-audio, RFC2833 and/or SIP INFO |
| Provisioning and Control | HTTP, HTTPS, TELNET, TFTP, TR-069, secure and automated provisioning using AES encryption, syslog |
| Security | |
| Media | SRTP |
| Control | TLS/SIPS/HTTPS |
| Management | Syslog support, telnet, remote management using web browser |
| Physical | |
| Universal Power Supply | Input: 100-240VAC, 50-60Hz |
| Output: 12V/0.5A | |
| Environment | Operational: 0º – 40ºC |
| Storage: -10º – 60ºC | |
| Humidity: 10 – 90% Non-condensing | |
| Dimension and Weight | 28.5 x 130 x 90 mm (H x W x D) |
| Weight: 353.33g | |
| Dimensions | 73.1 x 67.2 x 123.9mm |
| Weight | 300g |
