Broadband Voice

Voice telephony services continue to generate a large proportion of a network operator's revenue, and broadband networks have to support existing services, including voice.

Deploying a broadband-enabled voice platform is a key element of network evolvement, as existing PSTN platforms in many networks are approaching the end of their lifespan. Moving voice traffic onto data networks is also key to reducing network-ownership costs, with commodity bandwidth on multi-service networks representing the most efficient method of transport.

Fujitsu's complete broadband access solution includes innovative support for voice services, allowing operators and service providers to offer compelling bundled service packages rather than broadband Internet access alone. The solution caters for a range of network architectures - equally important for operators evolving their networks away from legacy voice platform, as for new operators.

GeoStream Access Gateway broadband voice solution

Provides both derived and baseband voice capability:

• Derived Voice: uses an Integrated Access Device to provide the physical telephony interface, converting the voice service into data for transport within the broadband DSL connection together with Internet traffic. Separate virtual circuits provide different QoS and bandwidths for individual services.
• Baseband Voice: basic telephony and ADSL are delivered from a single IV-LCSS line port, with the voice-to-data conversion performed within the DSLAM. This capability allows customers to be connected to the IV-LCSS for voice services, and then be 'upsold' broadband services without the need for an engineer to visit the exchange.

Fujitsu’s voice solution key technology elements

• GeoStream Access Gateway DSL platform
• GeoStream Media Gateway
• GeoStream Call Server
• Integrated Access Devices

Utilising advanced traffic management features, GeoStream Access Gateway guarantees the required QoS for packetised voice connections, enabling PSTN-equivalent services to be delivered. Fujitsu's (hot tech naming) Integrated Voice line card subsystem (IV-LCSS) allows any copper line to support baseband voice and broadband delivery simultaneously. No external splitters or PSTN equipment are required - all voice and broadband traffic is processed by the IV-LCSS. It includes full voice-over-packet support, for interworking with the GeoStream Media Gateway.

Single or multiple "derived" voice lines can be provided over a single telephone line, with Integrated Access Devices (IAD) installed at the customer premises. IADs offer combined data and voice access, with the voice service interworking with the GeoStream Media Gateway and GeoStream Call Server platforms, using standards-based VoATM or VoIP protocols.

These elements combine to form a complete broadband voice solution to meet the widest range of applications - from residential telephony to multi-line business, together with value-added data and video services.