Detil
Grandstream HT881 Technical Specifications
Telephony Interface
- HT881: 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
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 Fax Pass-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 using AES 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: 4-8V / 0.5A
- DC Input: 12V/1A
Environmental
- Operational: 32°F - 104°F
- Storage: 14°F - 140°F
- 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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