HT842R

HT-842R

   Overview

The HT-842R is designed as a compact, high performance, and low cost Analog Terminal Adaptor (FXS Gateway).  It comes with 4 FXS ports to interface with traditional analog phone sets or PBX trunk lines for VoIP communications.  The HT-842R is a full featured FXS gateway and is designed for easy installation and configuration.  It supports the two most widely used Open VoIP Standards (SIP and H.323). This allows the HT-842R to interoperate seamlessly with softswitches or IP PBXs made by various vendors. Its high performance offers toll quality voice, flexible networking, and feature-rich call functions. It is an ideal low cost solution for SME environment where multiple lines are required.

Key Features

  • Open Standard VoIP Protocols (ITU H.323 V4 and IETF SIP V2)
  • Single or Multiple Server Registrations
  • Peer-to-Peer IP Calls
  • Two 10/100 Ethernet for WAN / LAN connections
  • Speech quality ensured by QoS at the Ethernet and IP layers and comprehensive jitter buffer
  • Line Echo Cancellation
  • VLAN and QoS support
  • NAT Transversal and Router functions
  • Voice prompts, HTTP Web, Auto Provision support for configuration and updates
  • Highly stable embedded Linux operating system in high performance ARM 9 Processor
Basic Features
  • Four RJ-11 FXS ports for traditional phone sets or PBX's trunk lines
  • LEDs for Power, Ready, Status, WAN, PC, FXS ports 
  • Call Forward, Call Hold, Call Transfer
  • Dial Plan
  • Caller ID

Enhanced Features

  • Dynamic selection of codec
  • Advanced jitter buffer
  • Automatic traversal of NAT and firewall
  • VLAN / Qos
  • Router
  • Echo cancellation for Speakerphone
  • Comfort noise generation (CNG)
  • Voice activity detection (VAD)
  • Auto provisioning (requires auto provisioning server)
  • On line firmware upgrade
  • Multi-language support: English and Chinese

Supported Standards

  • ITU: H.323 V4, H.225, H.235, H.245, H.450
  • RFC 1889 - RTP/RTCP
  • RFC 2327 – SDP
  • RFC 2833 – RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals
  • RFC 2976 – SIP INFO Method
  • RFC 3261 – SIP
  • RFC 3264 – Offer/Answer model with SDP
  • RFC 3515 – SIP REFER Method
  • RFC 3842 – A Message Summary and Message Waiting Indicator
  • RFC 3489 – Simple Traversal of User Datagram Protocol (UDP) Through Network Address Translators (NATs)
  • RFC 3891 – SIP “Replaces” Header
  • RFC 3892 – SIP Referred-By Mechanism
  • draft-ietf-sipping-cc-transfer-04 –  Session Initiation Protocol Call Control - Transfer
  • Codec: G.711 (A/µ law), G.729A/B, G.723.1
  • DTMF: RFC 2833, In-band DTMF, SIP INFO

Physical and Environmental

Operating temperature: 10°C to 40°C (50°F to 104°F)

Storage temperature: 0°C to 50°C (32°F to 122°F)

Weight:   1.1 kg (2.42 lb)  (Including AC/DC Adapter)

Size:    mm (W) x    mm (L) x    mm (H) (   ” x     ” x     ”)

Power: 24 Vdc 500 mA  (AC/DC adapter included)

Safety:

Emissions:

Immunity:

Other Approval: 

Warranty: one year

 

$85 + p&h

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