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The service, called PC 2 UK, is designed as a value-add service for MSN users, and allows customers to make telephone calls from their computers.
The service will use MSN's Passport secure server, unmetered access to BT's telephone network, for which users pay a fixed monthly fee, and Cisco's PGW 2200 and AS5000 Series Gateways for call routing between traditional telephony networks and VoIP networks.
The VoIP networks use Cisco's Session Initiation Protocol (SIP) and H.323 products. The company will also provide security for the service with its Cisco PIX firewall product.
Customers using Microsoft XP as their operating system will also be able to integrate instant messaging, multimedia services and telephony services with Microsoft Messenger as the PC client.
Cisco's gateway will also support the BT NetChat service, which is based on the standard H.323 protocol and operates with Microsoft's NetMeeting.