Grandstream Networks HT812 VoIP telephone adapter

The HT812 delivers powerful VoIP technology and routing capabilities to home and office environments, and allows users to successfully connect their analog devices to a manageable and powerful VoIP network. Built using Grandstream s market-leading SIP ATA/gateway technology, with millions of units successfully deployed worldwide, this powerful ATA features exceptional voice quality in various applications and environments. The HT812 comes with 2 easy-to-use FXS ports, an integrated Gigabit NAT router, state-of-the-art encryption with a unique security certificate per unit, automated provisioning for volume deployment and device management and outstanding network performance.

Features
Voice codecs:	iLBC, G.711, G.723.1, G.726, G.729A, G.729B, OPUS
Fax compatibility:	T.38
Reset button:
LED indicators:
Certification:	FCC/CE/RCM, K.21
Network
Web-based management:
Quality of Service (QoS) support:
Call management
Caller ID:
Conference call:
Call waiting:
Protocols
Supported 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
Management protocols:	Telnet
Security
Security algorithms:	AES, HTTPS
Ports & interfaces
Ethernet LAN (RJ-45) ports:	2
Power
Output voltage:	12 V
Output current:	0.5 A
Logistics data
Harmonized System (HS) code:	85177900
Operational conditions
Operating temperature (T-T):	0 - 40 °C
Storage temperature (T-T):	-10 - 60 °C
Operating relative humidity (H-H):	10 - 90%
Weight & dimensions
Dimensions (WxDxH):	130 x 90 x 28.5 mm
Weight:	353.33 g
I/O ports:	2 x FXS, 2 x RJ-45