Grandstream HT881 FXO gateway

-8 FXS ports (analogue interfaces)
– Full compliance with the SIP and IAX2
standards – Flexible call rules
– Reliable fax functions via T.38
– Offers high-quality voice compression with industry-standard codecs –
Echo cancellation for 32, 64 or 128 ms echo Delay
-Web-based graphical user interface for easy configuration and management
-Excellent compatibility with a wide range of legacy and IP devices

> Key features
– Colour: Black
– Height: 25.6 mm
– Width: 200 mm
– Depth: 137 mm
– Product type: Analogue VoIP gateway

> system connections
– Number of Ethernet ports 10/100 Mbit/s: 1

> Technical specification
– Number of telephone channels: 8
– Telephone interfaces: 8 x RJ11 FXS interfaces –
Protocol: SIP (RFC3261), IAX2
– Transport protocols: UDP, TCP, TLS, SRTP –
DTMF: RFC2833, SIP INFO, In-band
-Codec: G.711 a/u-law, G.722, G.726, G.729a, GSM, ADPCM, Speex –
Echo cancellation: ITU-T G.168 LEC
-FAX over IP: T. 38 and beyond -Out
– Signalling: Kewl Start, Loop Start
-Number transmission: BELL202, ETSI (V23), NTT (V23-Japan) and DTMF based
-Disconnection: busy tone, polarity reversal
-LAN: 1 (10/100Mbps)
– Network: Static IP, DHCP client, firewall, VLAN, DDNS, QoS, OpenVPN
-NAT traversal: Static NAT, STUN
-Power supply: 12V 1.5A
-Operating temperature: 0°-50°C, 32°-122°F
-Storage temperature: -20°-65°C, 4°-149°F –
Humidity: 10-90% non -Condensing

> Features
-Three-way conference
-Attended transfer
-Blacklist
-Unattended transfer -Call data logging -Caller ID -Call forwarding
away, busy or always -Call waiting -Call status display -Do not disturb (DND) -IP blocker list -Network attack alert -Paging -RADIUS accounting and login (RADIUS server) -True open API protocol (Asterisk based)