Duxbury Networking, in association with its principal ZyXEL Communications, has introduced a range of Internet Protocol (IP)-based Digital Subscriber Line Access Multiplexer (DSLAM) terminates designed to complement emerging technologies in ‘last mile’ telecommunications applications.

The move was prompted by the expected demand for more bandwidth from both residential and business customers in South Africa in the wake of falling costs associated with the recent commissioning of the Seacom submarine fibre-optic cable system linking southern Africa to global networks.
Duxbury Networking chief technology officer Andy Robb says an IP-based DSLAM provides distinct advantages over conventional ATM-based DSL access systems for the pervasive Digital Subscriber Line (DSL) technologies in last mile access applications.
“This is because it terminates all Asynchronous Transfer Mode (ATM) electronic digital data transmission circuits and converts traffic directly to the Internet,” he says. “An IP DSLAM is the most natural solution for data transmission as it provides better bandwidth utilisation, ease of use and boasts a number of cost efficiency advantages.”
Robb says the DSLAM solution will enable telco service providers to broaden their range of high performance Internet access offerings on IP infrastructures.
“The ZyXEL IP DSLAM series, with its flexible design makes the solution more versatile,” he stresses. “Service providers will now be able to offer IP-based services at reduced cost, at the same time giving customers the benefits of enhanced security and performance.”
Robb adds that the multicasting design philosophy behind the ZyXel DSLAM terminates provides is efficient in network video applications and will address increases in marketplace demand for video conferencing applications.
“New advances in ZyXEL IP DSLAM technology help ensure quality of service, while built-in SNMP [Simple Network Management Protocol] functions provide easier network management and enable service providers to boost video conferencing and other broadband services to customers at a lowest cost than was previously possible.”