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OverviewThe HT-322 is
designed as a compact, high performance, and low cost FXO
Gateway. The FXO detection is optimized to avoid the hold
up of the PSTN line when the other party is disconnected.
This has been one of the key issue in the design of FXO gateway.
The incoming PSTN Caller ID is also |
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transmitted to the VoIP user for more user friendly operation. The HT-322 is a full featured FXO gateway and is designed for easy installation and configuration. It is an ideal solution for VoIP to PSTN termination in both SME and SOHO environment. |
Key Features
- Open Standard VoIP Protocols (ITU H.323 V4 and IETF SIP
V2)
- Single or Multiple Server Registrations
- Two 10/100 Ethernet circuits connect to the LAN and an
additional device
- Two FXO ports for PSTN terminations
- 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
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Basic Features
- 2 RJ-11 FXO ports for PSTN lines or PBX's extensions
- LEDs for Power, Ready, Status, WAN, PC, FXO ports
- Call forward from PSTN to VoIP and VoIP to PSTN
- Dial in mode or dial out mode only
- Dial Plan
- Password protection for both PSTN dial in or dial
out
- Retransmit PSTN Caller ID to VoIP terminal
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: 1.9 kg (4.2 lb)
(Including AC/DC Adapter)
Size: mm (W) x mm (L) x mm (H)
( ” x ” x ”)
Power: 12 Vdc 500 mA (AC/DC adapter
included)
Safety:
Emissions:
Immunity:
Other Approval:
Warranty: one year
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