PCM Transcoder

The HC-5560 digital line transcoder provides encoding and decoding of pseudo ternary line code substitution schemes. Unlike other industry standard transcoders, the HC-5560 provides four worldwide compatible mode selectable code substitution schemes, including HDB3 (High Density Bipolar 3), B6ZS, B8ZS (Bipolar with 6 or 8 Zero Substitution) and AMI (Alternate Mark Inversion).

Features

? Single 5V Supply . . . . . . . . . . . . . . . . . . . . . .? 10mA (Typ)

? Mode Selectable Coding Including:

- AMI (T1, T1C)

- B8ZS (T1)

- HDB3 (PCM30)

? North American and European Compatibility

? Simultaneous Encoding and Decoding

? Asynchronous Operation

? Loop Back Control

? Transmission Error Detection

? Alarm Indication Signal

? Replaces MJ1440, MJ1471 and TCM2201 Transcoders

Applications

? North American and European PCM Transmission Lines where Pseudo Ternary Line Code Substitution Schemes are Desired

? Any Equipment that Interfaces T1, T1C, T2 or PCM30 Lines Including Multiplexers, Channel Service Units,

(CSUs) Echo Cancellors, Digital Cross-Connects (DSXs), T1 Compressors, etc.

? Related Literature

- AN573, The HC-5560 Digital Line Transcoder