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Both support SIP and H.323 protocols:

SIP Registration and Digest Authentication Mode; H.323 Gatekeeper Registration.

SIP Single Number / Account for multiple ports.

Caller ID Delivery: FXS support DTMF Caller ID generation.

Flexible and Smart VoIP call Dialing Book: VoIP call Book could provide any application VoIP call to any type

destination (Domain name / IP address, PSTN or PBX) or hunting number setting.

AC termination Impedance : 600/900 OHM and complex impedance

Answer Supervision for Polarity Reversal Detection and Voice detection

NAT traversal: This feature allow gateway to operate behind any NAT/Firewall device. Need not to change any

configuration of NAT/Firewall like setting virtual server.

Smart-QoS: This feature provides good voice quality when user place a VoIP call and also access internet at the

same time. The gateway will automatically start to reserve bandwidth for voice traffic when VoIP call proceeds.

Call Hunting Facility: This function helps gateway to use the lines effectively. This facility automatically transfers

your incoming call to a free line. Subscribers need not indicate numerous numbers of each port of gateway.

Voice channels status display: This function display each port status like as on-hook, off-hook, calling number

called number, talk duration, codec.

Flash Detection and Generation Program: FXO support Flash Generation and FXS support Flash Detection.

FXO answer Mode : FXO provides Ringing Answer, Connection Answer and Non Answer for configuration.

FXO anti-seized mechanism : FXO provides busy tone auto-learning and manually configuration

busy tone learning.

The Soundwin S200 Series VoIP Gateway is fully both SIP and H.323

standard compliant residential gateway that provides a total solution

for integrating voice-data network and PSTN. By simple installation,

this revolutionary compact voice over IP (VoIP) gateway could be

configured as a 2/4 port FXS/FXO VoIP Gateway which provides

voice connectivity over the IP network and to the Public Switched

Telephone Network (PSTN).The Soundwin Gateway is equipped with

a four port Ethernet switch and built-in NAT router function that

provides Internet access using only one IP address.