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Applications for SmartNode 4520 Series
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Model 4520 & 4110 Series Getting Started Guide
2 • Applications overview
Application—PBX toll bypass gateway
The gateways can be used to provide toll bypass over an IP WAN (see figure 13 ). The call routing in this case is
provided by the PBX systems. A call routed to the FXS gateway can be relayed on a port-to-port basis or
depending on the dialed-number to the remote gateway.
Note With the use of FXS ports, extension dialing on the secondary side must be
done by using two-stage dialing (DTMF relay) or a call attendant. DID is not
available when using a SmartNode FXS port connected to a PBX FXO port.
Figure 13. Toll bypass
Applications for SmartNode 4520 Series
SmartNode 4520 Series devices have dual 10/100Base-T Ethernet ports. The two Ethernet ports provide full
featured IP routing between LAN and WAN plus Ethernet and IP layer QoS services. Voice prioritization and
traffic management avoid network congestion and provide optimal voice quality. With these additional fea-
tures the SmartNode 4520 series can add Internet access and data networking to any of the SmartNode 4110
Series applications described previously. The following sections show some typical combined voice-
data applications.