Product Details 4FXS Gateway

4FXS Gateway

Quick Overview

4 FXS (lines) gateway for PBX or server.

Product Description

4 FXS is a four-port telephone extension to IP network gateway and support SIP RFC 3261 protocol. It provides telephone services and T.38 fax over IP network with easy operation and configuration PBX or server.

Product Highlights

  • Easy access to IP from phone set or PBX
  • Cost Saving - Telephone call from VPN or public Internet
  • Follows the existing telephone call dial plan
  • Easy interface to ADSL/Cable Modem or Leased line equipment
  • Easy to Integrate with all kinds of PBXs

Warranty Information

Under the Competition and Consumer Act a 12 month warranty applies to this hardware


SIP RFC 3261

Telephony Features

  • Call Hold
  • Call Transfer
  • Call Forward

FAX support

  • Automatically FAX detection
  • T.38 G3 FAX
  • Group 3 Fax relay at 2.4 - 14.4 kbps

Audio Codec support

Voice codec

  • G.711A/?-law
  • G.723.1, G.729A
  • G.729, G.729B
  • G.729AB

Network Interface

10/100Base-T Ethernet RJ-45 port x 2

FXS Interface

  • RJ-11 Telephone port (FXS) x 4
  • 2-wire loop start
  • Programmable AC impedance, Feeding voltage, Ring Voltage, Ring Cadence, Loop current and call progress tone
  • ON-Hook Voltage: 48Vdc
  • Ring Voltage: 50 V RMS
  • Loop Current: Constant 23mA
  • Support Payphone Charge signal 12K/16K/Polarity Reversal+

Voice Quality

Voice codec

  • VAD (Voice Activity Detection)
  • CNG (Comfort Noise Generation)
  • AEC (Acoustic Echo Cancellation) -- G.168
  • Dynamic Jitter Buffer


AC Power

  • Input AC 100V~240V Output DC12V


  • Temperature : 0°C~40°C
  • Humidity : 10%~90%RH

Dimension and Weight

Voice codec

  • Dimension: 223mm(W) x 35mm(H) x 152mm(D)
  • Weight (unit): 1.4 kg