XRT95L34

• A single chip solution for ATM UNI and packet over SONET
• Provides the highest level of protection switching flexibility for up to 1:14 protected OC-3/STM-1 ports.
• Provides quad serial OC-3/STM-1 interfaces with integrated CDR, compatible with industry standard optical modules.
• Provides serial OC-12/STM-4 interfaces with integrated CDR, compatible with industry standard optical modules.
• Supports the mappings for any standard combination of STS-12c/AU-4c or STS-3c/AU4.
• Provides four 8-bit busses on the line side running at 19.44 MHz to connect OC-12 framers through a parallel interface or aggregate four low speed OC-3 devices into an OC-12 line.
• Supports both SONET and SDH on all interfaces. SONET/SDH is programmable per interface.
• Terminates Section Overhead, Line Overhead and STS-Path Overhead on 4xOC-3, 1xOC-12 interfaces. Supports performance monitoring and alarms required by GR.253, G.707 and ANSI T1.105.
• Provides SONET frame scrambling and de-scrambling.
• Supports 50 msecond APS by monitoring and filtering K1 and K2 bytes as required by the standards.
• Offers differential line interfaces.
• Offers multiple microprocessor compatible interface
  - Intel, Motorola, PowerPC, Mips.
• Provides 8/16-bit data UTOPIA level II Interface and POS interface.
• Includes ATM cell or PPP packet Mapping.
• Single +3.3V power supply with +5V input tolerance.

The XRT95L34 is an OC-12/STM-4, Quad OC-3/ STM-1 POS/ATM Framer with integrated CDR's. ATM direct mapping and cell delineation are supported, so are packets (PPP) over SONET for POS mapping and frame processing. The XRT95L34 contains an integral SONET framer which provides framing and error accumulation in accordance with ANSI/ITU-T specifications. The configuration of this device is through internal registers accessible via an 8-bit parallel, memory mapped, microprocessor interface.