Synchronous systems and asynchronous systems

In a synchronous system, all service signals from service boards to cross-connect boards are synchronous (same frequencies and aligned frame headers), and both time-division and space-division cross-connections can be implemented inside cross-connect chips.
In an asynchronous system, service signals from service boards to cross-connect boards are asynchronous (different frequencies and unaligned frame headers). Services are independent of each other, and only space-division cross-connection can be implemented inside cross-connect chips.
The OSN 8800 is a synchronous system, while the OSN 6800 is an asynchronous system.

Scroll to top