Network Router User Manual

Common Deployment Scenarios
The SRX210 Services Gateway with Integrated Convergence Services is deployed in
following environments:
■ Enterprises that deploy VoIP in their headquarters and want to enable VoIP
functionality for 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
trunking services
Related Topics ■ Understanding the Functions of the SRX210 Services Gateway with Integrated
Convergence Services on page 41
■ SRX210 Services Gateway Integrated Convergence Services Interoperability on
page 42
■ Configuring the SRX210 Services Gateway with Integrated Convergence Services
on page 43
■ SRX210 Services Gateway with Integrated Convergence Services Front Panel
and Back Panel Views on page 12
Understanding the Functions of the SRX210 Services Gateway with Integrated
Convergence Services
SRX210 Services Gateway with Integrated Convergence Services functions as follows:
■ Analog telephones and fax machines are directly connected to the SRX210
Services Gateway with Integrated Convergence Services through Foreign Exchange
Station (FXS) interfaces.
■ The telephone exchange or PSTN central office is directly connected to the
SRX210 Services Gateway with Integrated Convergence Services through Foreign
Exchange Office (FXO) interfaces.
■ The media gateway converts analog signals from FXS and FXO ports and digital
TDM signals from T1/E1 ports to VoIP packets and sends them to the network
after processing through JUNOS software secure routing and firewall flows.
Similarly, the media gateway receives forwarded VoIP packets from the network,
and converts them into analog signal 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 by providing a hardware relay between the built-in FXS2 port and FXO1
port, which automatically connects the two ports when the media gateway loses
power.
Understanding the Functions of the SRX210 Services Gateway with Integrated Convergence Services ■ 41
Chapter 5: SRX210 Services Gateway with Integrated Convergence Services