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Thiết bị Analog FXO Gateway Grandstream HT881 :
Thiết bị Analog FXO Gateway Grandstream HT881
| Model | HT881 |
| Interfaces | |
| Telephony Interface | • 8 RJ11 FXO ports/1 RJ11 FXS |
| Network Interface | • Two 10/100/1000Mbps RJ45 ports, one with 802.3af PoE-PD support • Note: Up to 1000Mbps in Bridge mode, up to 100Mbps in NAT mode |
| LED Indicators | • POWER, NET1, NET2, FXS, FXO |
| 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.729, 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 FaxPass-through |
| Short/Long Haul Ring Load | • 3 REN: Up to 1km on 24 AWG |
| 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, TFTP, SSH, TR-069, secure and automated provisioning usingAES encryption, syslog |
| Security | |
| Media | • SRTP |
| Control | • TLS/SIPS/HTTPS |
| Management | • Syslog support, Telnet, SSH, Remote management using web browser |
| Physical | |
| Universal Power Supply | • POE Input: 4 8 V / 0 . 5 A • DC Input: 12V/1A |
| Environmental | • Operational: 32º – 104ºF • Storage: 14º – 140ºF • Humidity: 10 – 90% Non-condensing |
| Dimension and Weight | • 190mm x 100mm x 28mm (L x W x D) • Weight: 0.46KG |
| Compliance | • FCC/CE/RCM/IC/UKCA |
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