It's the same type of open, standards-based collaboration that has enabled the Internet to flourish. And with OPT, Cisco and its providers will bring that same innovation to traditional circuit-switched networks. Moreover, carriers can deploy this service without being locked in to proprietary solutions, since standards are open and published. This approach offers telephony service providers the same dynamism and openness that characterizes the Internet. At the edge of the network, Cisco multiservice access gateways originate and terminate calls from the PSTN and convert them into packet calls.
Gatekeepers provide call control, routing the calls to the application provider's server.
The server contains the subscriber database, administrative functions, and call-control logic. It's also an attention-getting service that differentiates carriers in an increasingly crowded marketplace. Cisco and Click to Dial Click to dial is just one example of the enhanced services based on Open Packet Telephony. It's a product of the ecosystem of developers who are committed to realizing the potential of packet-switched networks. Inc. Important Notices and Privacy Statement .