Integrated access device supports ELCP signalling

RAD Data Communications has unveiled upgrades to its LA-140 advanced ATM integrated access device (IAD), which provides voice and data connectivity over ATM over xDSL. These new enhancements include ISDN signalling based on ELCP (Emulated Loop Control Protocol) and support for IP capabilities such as PPP over ATM, PPP over Ethernet and ADSL Annex A and B. The LA-140 incorporates a standard ELCP signalling stack to support ISDN signalling over ATM.

ELCP is a standard protocol that specifies the mechanism where V5.2-based signalling messages are exchanged between the VoDSL Gateway and IAD to support both POTS (plain old telephone system) and ISDN voice over ATM.

The standard is currently supported by leading VoDSL gateway vendors such as Tdsoft and Alcatel.

Cirpack, Jetstream and others are expected to follow shortly.

BLES-CCS/ELCP offers carriers major benefits, including concentration and dynamic channel allocation capabilities and reliable connectivity between the VoDSL gateway and IAD.

"In comprehensive testing at carrier sites, the DSL Forum and the DSL Standards Lab at the University of New Hampshire, the LA-140 was found to be fully interoperable with equipment from major DSLAM vendors and VoDSL gateway equipment", states Avi Katz, Senior VoDSL Product Line Manager at RAD Data Communications.

Currently, the LA-140 supports G.SHDSL, ADSL, SDSL-2B1Q and ATM-E1 uplinks.

The product provides support for voice over DSL in compliance with the ATM Forum's Loop Emulation Service (LES) standard, which facilitates the connection to analogue phones, ISDN equipment, PBXs or other channelised E1 devices.