Intersil is addressing the need for more reliable, toll grade voice-band telephony in broadband systems with a new gateway controller IC for use in Voice-over-Internet Protocol applications

Intersil is addressing the need for more reliable, toll grade voice-band telephony in broadband residential and enterprise systems with a new gateway controller IC for use in Voice-over-Internet Protocol (VoIP) applications. The ISL5586 extends the versatility of the company's existing gateway product family by adding devices that can also be incorporated into Data Over Cable Service Interface Specification (DOCSIS) compliant cable modem gateway products.

This article was originally published on Electronicstalk on 5 February 2001 at 8.00am (UK)
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Cable modems based on this standard will support voice-band telephony and high-speed data over the cable network infrastructure, offering the potential of low cost telephony in addition to Internet service, in-home networking and cable television for cable subscribers.

Cable modem use is growing fast.

The addition of Ethernet, HomePNA 2.0 and VoIP capability has driven the development of highly integrated circuit solutions designed expressly for cable modems and other devices that converge voice and data streams.

Combining a complex cable modem IC and tuner IC with four of Intersil's new gateway ICs provides virtually all the silicon content for a voice-enabled cable modem gateway, and greatly reduces the cost and time to market that is normally required for these complicated products.

The ISL5586 meets the telephony requirements for Voice over DSL (VoDSL) integrated access devices (IAD) or voice enabled DSL modems and BWA subscriber terminals, and is compatible with a variety of analogue subscriber equipment such as V.90 modems and fax machines.

Toll quality voice signals are transmitted to an integrated cable modem chip or a voice-band codec over a low level, low noise differential signal interface.

Intersil's ISL5586 delivers controlled power to the telephone handset while consuming only 57mW in additional overhead power.

The integrated ringing function eliminates the need for costly ring generators and electromechanical relays.