Common Deployment ScenariosThe J-SRX210 Services Gateway with Integrated Convergence Services is deployed infollowing environments:• Enterprises that deploy VoIP in their headquarters and want to enable VoIP functionalityfor their branch offices.• Services providers (SPs) who provide VoIP services to their business customers.• Branch sites currently using a local key system or PBX that want to utilize SIP trunkingservicesRelated Topics Understanding the functions of the J-SRX210 Services Gateway with IntegratedConvergence Services on page 37•• J-SRX210 Services Gateway Integrated Convergence Services Interoperability onpage 38• Configuring the J-SRX210 Services Gateway with Integrated Convergence Services onpage 39• J-SRX210 Services Gateway with Integrated Convergence Services Front Panel andBack Panel Views on page 12Understanding the Functions of the J-SRX210 Services Gateway with IntegratedConvergence ServicesJ-SRX210 Services Gateway with Integrated Convergence Services functions as follows:• Analog telephones and fax machines are directly connected to the J-SRX210 ServicesGateway with Integrated Convergence Services through Foreign Exchange Station(FXS) interfaces.• The telephone exchange or PSTN central office is directly connected to the J-SRX210Services Gateway with Integrated Convergence Services through Foreign ExchangeOffice (FXO) interfaces.• The media gateway converts analog signals from FXS and FXO ports and digital TDMsignals from T1/E1 ports to VoIP packets and sends them to the network after processingthrough JUNOS Software secure routing and firewall flows. Similarly, the media gatewayreceives forwarded VoIP packets from the network, and converts them into analogsignal or digital TDM signals and send them across the appropriate interface.• The media gateway also provides power failover support in the event of power loss byproviding a hardware relay between the built-in FXS2 port and FXO1 port, whichautomatically connects the two ports when the media gateway loses power.37Chapter 5: J-SRX210 Services Gateway with Integrated Convergence Services
