VSC8150

General Description
The VSC8150 monitors an SONET/SDH signal in order to provide section and line data for Operations, Administration, Maintenance, and Provisioning (OAM&P) at multiple SONET/SDH rates. Differential PECL clock and data input receivers and a differential data output isolate the high-speed interface. Low-speed TTL inputs and outputs allow the use of inexpensive programmable logic to perform OAM&P functions. The VSC8150 is an ideal solution for constructing a non-intrusive SONET/SDH monitoring interface when visibility of  ayload data is not required.

Functional Description
The VSC8150 high-speed interface receives recovered SONET/SDH data RXSIN +/- and clock RXSCLKIN +/- and  rovides a re-timed data output RXSLBOUT +/-. Internally the data is framed and SEF/LOF framing alarms generated. Incoming B1 parity is calculated and compared with the transmitted B1 value, and detected errors are output. The 27 bytes of the first STS-1 transport overhead are descrambled and output for processing.