Payphone
2 / 4 / 8 / 16 /24 Pulse Metering FXS VoIP Gateway
	The Soundwin S200/S400/S800/S1600/S2400 VoIP Gateway is fully both SIP and H.323 standard compliant residential gateway that provides a Payphone solution for integrating voice-data network and payphone. By simple installation, this revolutionary compact voice over IP (VoIP) gateway could be configured as a 2/4/8/16/24 port FXS VoIP Gateway which provides voice connectivity over the IP network and to Payphone system
Call Flow: User place a call The VoIP gateway send an Access-Request to the rate server. The rate server reply with an Access-Accept including the meter pulse pattern. The gateway decode the meter pulse pattern and make the outbound call on the H.323 / SIP Network. After receipt of the Connect message, the gateway begin to apply the meter pulse pattern to send pulse depend on the pulse pattern.