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PSTN Replacement Thomson’s Cirpack switches are the ideal alternative for extending the PSTN. They have been designed with TDM requirements in mind but are made using open, industry-standard, next-generation hardware and software technologies. This means they cost a fraction of what a legacy TDM switch is worth and are much easier to install, configure, operate and upgrade. Many operators have been using Cirpack switches as pure TDM switches for years. This is a field-proven technology that is ready for the future, since Cirpack switch units can be equipped with high-density VoIP interfaces for packet telephony services. Thomson’s Cirpack switches fully support R2, ISDN and SS7 protocols, including all local variants; they have built-in SDH interfaces for E1 transmissions over fiber and can be configured as Transit (Class-4) and/or Local Exchange (Class-5) switches. Interface cards can be loaded with whatever drivers or signaling functions are required, making for a very flexible solution that can be deployed in just a few days, and which is very quick and easy to adapt, upgrade and maintain. When configured as Transit switches, Thomson’s Cirpack switches support advanced routing features and value-added services, such as number portability, complex SS7 interconnection, reverse billing, dynamic routing, 800 services, Least Cost Routing (LCR), indirect access services, etc. When used as Local Exchange switches, Thomson’s Cirpack switches offer all the transit features as above, plus all legacy Class-5 and ISDN supplementary services use by operators and subscribers. They can connect PBXs via ISDN PRI/BRI or R2, and fully support V5.1 and V5.2 protocols for extensive interoperability with legacy Access Nodes providing POTS and ISDN BRI connectivity. They even support H.248/Megaco to control Multiservices Access Gateways over IP and provide seamless POTS services to end-users. Thomson’s Cirpack switches enable carrier-grade PSTN services:
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