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The attached diagram provides a simplified architectural view of the network topology used to perform interoperability between Primelink and Sipxecs:
Primelink uses Metaswitch's softswitch and session border controller (SBC) technologies for the delivery of IP-based telephony to business customers. Optical Line Terminals (OLT) at the Primelink central office terminates the fiber access from multiple customers and front-ends the Metaswitch voice switching infrastructure. The Metaswitch SBC acts as a Back-to-Back User Agent (B2BUA) for the softswitch as well as upstream IP-based long-distance carriers. Local and long-distance TDM-based PSTN traffic is converted to IP via media gateways connected to the Metaswitch softswitch.
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