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Quick Details

  • Place of Origin: Guangdong, China (Mainland)
  • Brand Name: Realtonetech
  • Model Number: WSS4-4S
  • Type: VoIP Gateway, VoIP ATA
  • Protocol: SIP & MGCP
  • Fax: T.38 & T.30
  • Codec: G.711u/aLaw, G.729A, G.723.1, GSM, iLBC
  • Certificate: CE/FCC
  • MWI NENO: 100v High Voltage, FSK
  • Management: GUI, TR069, Auto Provision
  • IMS specs: Yes
  • Microsoft Lync: Supported
  • FXS: Max 4 ports

Packaging & Delivery

Packaging Details One pcs Paper package, Weight 0.9Kg, Size: 26*23*7cm
10 pcs package: 48*38*34cm,10.5Kg
20 pcs package: 48*38*34cm,10.5Kg
Delivery Time Shipped in 3 days after payment

VoIP ATA Gateway with 4 to 8 FXS/FXO ports, nice VoIP SIP access gateway for IP-PBX, IPcentrex, Call Center, VoIP Service provider; VoIP Phone adapter ATA, IAD, with PSTN ports;




WSS4 is a multi-purpose VoIP gateway product series designed with the needs of service providers and enterprises in mind. With WSS8 gateways, service providers can provide telephony and fax services to subscribers using many access methods such as FTTB, HFC, and ADSL. Enterprises can use the WSS4 traditional PBX interface to implement voice VPN solutions with their private IP or public VPN networks. WSS4 can also serve as a remote SIP terminal for IP-PBX solutions.

WSS4 ATA gateway  includes 4 different models: 4 FXS ports, 4 FXO ports, 2FXS and 2FXO ports.  WSS4 product series embeds Motorola 50Mhz 32-bit central processor MPC852 and uses TI high performance C5509 DSP for voice processing. It delivers rich features, high voice quality, and high interoperability.


Main Applications

  • Remote SIP access gateway for IP-PBX like Asterisk/3CX hosted IP PBX system;
  • IP based wide area PBX for enterprise, government branches and schools
  • VoIP Long Distance application for IP phone supermarkets and enterprises
  • Carrier primary and secondary line service
  • Small and home offices
  • 4,8 FXO ports PSTN gateway can be working for calling card or call termination with PSTN lines or GSM/CDMA fixed wireless terminal

Key Features 

  • MGCP or SIP access gateways 
  • SIP-PSTN analog gateway 
  • Routing (based on called number or other criteria) 
  • Radius based CDR for accounting 
  • STUN client for NAT transversal 
  • Flexible interface for analog phones, fax, traditional PBX with analog trunks 
  • Fax tone detection and codec bypass (T.30) and fax relay (T.38) function 
  • G.711, G.723.1, G.729A, iLBC, and GSM codec 
  • G.168 echo cancellation 
  • DTMF transportation: transparent mode, RFC 2833 mode, SIP/INFO mode 

Call Features

  • Caller ID
  • Message waiting indication 
  • Call waiting 
  • Call forwarding 
  • Caller ID on call waiting 
  • Call transfer (on busy, no answer, all) 
  • Special purpose calling codes 
  • Speed dial 
  • Redials

Supported Protocols

  • Session Initiated Protocol (SIP) 
  • Media Gateway Control Protocol (MGCP) 
  • Real Time Transport Protocol(RTP) 
  • TFTP for remote software upgrade 
  • HTTP for system and interface configuration and monitoring 
  • SNMP v.1, v.2, v.3 
  • Telnet for remote support 
  • DHCP for dynamic IP address allocation 
  • DTMF 
  • STUN Client for NAT/firewall traverse

Other Specifications 

  • Power: 5V/3A DC power supply (included with AC adaptors) Power Dissipation: 15 Watts(max) 
  • Talk Battery: -24 V 
  • Ringing Voltage: 50V RMS 
  • Loop Current: 21 mA 
  • Max Line Length: 1500m or 415 ohm 
  • REN Equivalence: 5 for short loop (1000 feet) ,3 for long loop (5000 feet) 
  • Analog Interface: RJ-11 
  • Off-hook Detection: Loop start 
  • Dialing: DTMF 
  • Memory: 32MB 
  • Flash: 8MB 
  • Size (L x W x H): 195 x 118 x 34 mm 
  • Weight: 650 gram





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