Telecoms, Datacoms, Wireless, IoT


Single chip T1/E1/J1 framer and LIU combination device family

10 September 2003 Telecoms, Datacoms, Wireless, IoT Fire & Safety

Exar is offering a next-generation silicon solution that incorporates a line interface unit (LIU) and framer in one innovative combination device. The XRT86L38, the first in a family of solutions, is an eight-channel (octal) device targeted at telecommunications equipment including digital access and cross connect systems, wireless base stations, and channel service units (CSUs) among others.

The devices incorporate Exar's R3 Technology (reconfigurable, relayless redundancy), a capability that delivers key benefits to customers designing T1/E1/J1 interface cards. The devices are reconfigurable with integrated termination supporting all common T1/E1/J1 line impedances, enabling customers to build one board with a single bill-of-materials.

Conventional approaches require fixed settings - T1, or E1, or J1, forcing customers to estimate both market needs, and choose device settings before manufacturing. This dictates that customers stockpile inventory of all configurations. Also, the series employs relayless redundancy eliminating the need for external relays for 1:1 and 1+1 applications by establishing a back-up channel that can be brought on-line in the event of failure.

The XRT86L38 device is an eight-channel physical-layer processor incorporating a T1/E1 (1,544 Mbps or 2,048 Mbps) framer and a LIU. Each of the eight framers has its own framing synchroniser and transmit-receive slip buffers. The device has a flexible microprocessor interface for easy configuration, control, and status monitoring.

The series is compliant with all the leading T1/E1/J1 specifications.

For more information contact Kobus van Rooyen, ASIC Design Services, 011 315 8316, [email protected]



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