Gold Member Since 2010
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Shenzhen DBL Technology Limited

4 Fxs Port, Ip Pbx, Voip Ata Device manufacturer / supplier in China, offering DBL 4-Port FXS (ATA) VoIP Gateway (HT-842R), 4 Port/Channel/SIM Card GSM Gateway GoIP4, 32 Ports GSM Gateway GoIP32 Support Bulk SMS VoIP Device and so on.

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Supplier Homepage Product VoIP ATAs(FXS) DBL 4-Port FXS (ATA) VoIP Gateway (HT-842R)

DBL 4-Port FXS (ATA) VoIP Gateway (HT-842R)

FOB Price: US $84 / Piece
Min. Order: 1 Piece
Min. Order FOB Price
1 Piece US $84/ Piece
Get Latest Price
Production Capacity: 10000PCS/Month
Transport Package: Packing Box Dimension: 27.5*17*6.5
Payment Terms: T/T, Western Union, Paypal
Basic Info
  • Model NO.: HT-842R
  • Trademark: DBL
  • Type: Gateway
  • Origin: Shenzhen
Product Description
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)

Power: 24 VDC 500 mA (AC/DC adapter included)
Hardware Characteristics Parameters Remarks
Model HT-922T  
Processer ARM9 133MHz  
DSP VP-101-1 196MHz  
RAM 16W  
Flash 4W  
Power supply DC 12V/500mA  
Power consumption Max  4W  
LED Operating and circuit light  
Network Card 10/100BASE-T ×2  
Weight 0.36KG  
Operating temperature 0-45 centigrade  
Working humidity 40%--90% non condensation  
Color Black  
RJ11 port 2 24V feed, 48V ringing
Warranty 1 year  
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