DS2141A can be used for creating a DS/ESF Channel Service Unit. This application note has the adequate information and schematic on how to use this device DS2141A to create this Channel Service Unit.
- This application uses "looped" timing (i.e., RCLK is tied to TCLK)
- MHz clock source is used as a transmit clock if no signal exists on the receive side; if the DS2291 declares a carrier loss, then the source of the TCLK will be switched from the recovered clock to the locally accurate 1.544 MHz source.
- The DS2141A will be used to detect the normal loop codes and to decode and encode the Facility Data Link (upon request, transportable C code firmware is available from Dallas Semiconductor that implements both ANSI T1.403 and AT&T TR54016).