ZyXEL IES-1248 ADSL2+ IP DSLAM Achieved NEBS Certification

Hsinchu, August 28, 2006 -- ZyXEL Communications Corp. (TSE:2391), the world’s leading broadband access solutions provider, today announced that it has successfully obtained the Network Equipment Building System (NEBS) certification for ZyXEL IES-1248, 48-port stand-alone ADSL2+ IP DSLAM. ZyXEL IES-1248, with its powerful QoS and comprehensive management features and temperature-hardened design, is suitable in remote offices, street cabinets or building basements for easy ADSL deployment and expanding user coverage.

"As a requirement for equipment used in Central Offices in the North American Public Switched Network, the strict NEBS criteria have become an universal measurement for excellent network products," said P.C. Lee, VP of Central Office Equipment Business Unit. "We are delighted that the IES-1248 is NEBS-certified, and achieving this official recognition for excellent quality is an important milestone in the continuous technology innovation of our company. The IES-1248 has been deployed around the world to provide more than 300,000 ADSL lines. With the passing of the rigorous NEBS tests, service providers can confidently deploy our solutions in their carrier class networks."

NEBS contains the most common set of safety, spatial and environmental design guidelines applied to telecommunications equipment in the United States. NEBS tests include GR-63-CORE and GR-1089-CORE, evaluating and measuring environmental, safety, and quality standards of telecommunications equipment regarding product functionalities.

To successfully obtain the certification, ZyXEL IES-1248 had to undergo a range of stringent tests, including electro-magnetic emissions, safety, power consumption, earthquake simulation and thermal and mechanical shock.

About ZyXEL IES-1248 IP DSLAM
Specifically designed to meet today’s requirement of distributed telco FTTx infrastructure, ZyXEL IES-1248 series is an 1.5U, 48-port stand-alone temperature-hardened ADSL2+ IP DSLAM with a built-in splitter. Two combo GbE uplink ports providing 1000Mbps RJ-45 copper or SFP fiber interfaces to support flexible deployment in a ring or tree topology.

The IES-1248 is designed for compactness, low power consumption, flexible network management features and is integrated with existing platforms. In addition, with superb service-aware IP features, such as QoS, IGMP Snooping, IGMP Proxy, Multicast VLAN Registration, and DHCP option 82, the IES-1248 is proven to assist service providers in seamless migration from the current HSIA to triple-play services at competitive CAPEX and OPEX.

Availability
ZyXEL IES-1248 series has 6 different configurations to suit the business needs of different ADSL markets:
IES-1248-51 (DC) with Annex A ADSL2+ line and splitter over POTS, DC power input with temperature-hardened design
IES-1248-53 (DC) with Annex B ADSL2+ line and splitter over ISDN, DC power input with temperature-hardened design
IES-1248-51 (AC) with Annex A ADSL2+ line and splitter over POTS, AC power input
IES-1248-71 (DC) with Annex A ADSL2+ line and splitter over POTS, DC power input with temperature-hardened design
IES-1248-73 (DC) with Annex B ADSL2+ line and splitter over ISDN, DC power input with temperature-hardened design
IES-1248-71 (AC) with Annex A ADSL2+ line and splitter over POTS, AC power input
All models are currently available and can be ordered via ZyXEL's global sales network.

About ZyXEL Communications
ZyXEL Communications Co. (TSE: 2391), headquartered in Hsinchu, Taiwan, is the world's leading broadband solution provider. ZyXEL's wide ranging Internet Protocol (IP) based networking solutions include access multiplexors, customer premise equipment, Internet security and Wireless LAN equipment, enabling high-performance network services for SOHO, small to mid-sized businesses and service providers. ZyXEL works closely with worldwide network equipment vendors, telecommunications companies, ISPs, and other major businesses. For more information, visit the company's Website at http://www.zyxel.com.