LED Indicators POWER, FXO, FXS, NET1, NET2.
Factory Reset Button Yes
Voice, Fax, Modem
Telephony Features
Caller ID display or block, call waiting, ash, 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 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, FTP/FTPS, ARP/RARP, ICMP, DNS, DDNS, DHCP, NTP, TFTP, SSH, 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 Methods In-audio, RFC2833 and/or SIP INFO
Provisioning and Control
HTTP, HTTPS, SSH, FTP, FTPS, Telnet, SSH, TFTP, TR-069, secure and automated provisioning using AES
encryption, syslog
Security
Media SRTP
Control TLS/SIPS/HTTPS
Management Syslog support, SSH, Telnet remote management using web browser.
Physical
Universal Power Supply
POE Input: 48 V / 0.5 A
DC Input: 12V/1A
Environmental
Operational: 32° – 104°F or 0º – 40ºC
Storage: 14° – 140°F or -10º – 60ºC
Humidity: 10 – 90% Non-condensing
Dimensions and Weight
● HT841/HT881
Dimensions: 190mm x 100mm x 28mm (L x W x D)
Weight: 0.46KG
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