RAD Enhances IAD to Enable ATM-Based Virtual Leased Line Services over xDSL
Intelligent LA-140 ATM Access Device Offers New Revenue Opportunities to Carriers and QoS and Lower Cost DSL Pipes to SMEs

RAD Data Communications has announced major enhancements to its
LA-140™ integrated access device (IAD) that will enable carriers to offer “virtual leased line services” over their ATM-based DSL networks. Key product features include new user interfaces: a serial data port with AALl CBR and E1/T1 ports using CES (circuit emulation service) and DB-CES (dynamic bandwidth circuit emulation service). The IAD integrates user traffic onto the ATM UNI over G.SHDSL, ADSL and E1/T1 links.

Leased Lines over ATM and DSL
“Until now, ATM services were basically available for the privileged few Fortune 500 corporations that required large pipes and could afford the expense,” explains Avi Katz, Senior Product Line Manager at RAD.
“With so much ATM-based DSL gear out in the field, carriers have been looking for ways to sell additional services over the lower speed DSL loops and capitalize on their ATM backbones. RAD’s LA-140 gives carriers a powerful, cost-optimized ATM access device targeted to the small and medium-sized (SME) business user. It’s also a boon for smaller enterprise customers eager to benefit from ATM’s statistical properties and
end-to-end service quality assurance, yet retain the simplicity of leased line services.”

The LA-140 enables enterprise routers connected to leased line services to migrate to a “virtual leased line connection” over ATM. In addition, the
LA-140 can be used to connect voice traffic at different branches.
Support for AAL1 CBR means that the LA-140 nails down bandwidth for mission-critical applications end-to-end across the ATM network, while
DB-CES frees up bandwidth for data when voice channels are not in
use. “DSL access may provide enterprises with a cost-effective solution for dynamic integration of voice and data traffic, at a fraction of the cost of leasing E1/T1 lines,” Katz explains. “Meanwhile, enterprises requiring fat ATM pipes at headquarters can build a network combining lower speed DSL from the branches and direct ATM service at the main office.”