Whether service provisioning is affected if a synchronous device is added to an OTN ring of an asynchronous system

AR routers support the following three types of 8AS cables: 1. Straight-through cables, which apply to financial scenarios where dumb terminals are used X1 Signal Direction X2 (Female connector) 1 DCD �? 1 2 DTR �? 2 3 DSR �? 3 4 GND - 4 5 RXD �? 5 6 TXD �? 6 7 CTS �? 7 8 RTS �? 8 2. Asynchronous serial cables, which apply to common scenarios X1 (Male connector) Signal Direction X2 (Female connector) 1 DCD �? Blue 2 DTR �? Orange 3 DSR �? White and brown 4 GND - White and blue 5 RXD �? Green 6 TXD �? White and green 7 CTS �? Brown 3. Adapter cables, which are used together with the preceding two types of cables and apply to telecommunication or common scenarios X1 (Male connector) Signal Direction X2 (Female connector) 1 DCD �? Blue 2 DTR �? Orange 3 DSR �? White and brown 4 GND - White and blue 5 RXD �? Green 6 TXD �? White and green 7 CTS �? Brown 8 RTS �? White and orange 4. Self-made cables, which are used in serial port server scenarios X1 Signal Direction X2 (Female connector) 1 DCD �? 4 2 DTR �? 7 3 DSR �? 2 4 GND - 5 5 RXD �? 3 6 TXD �? 6 7 CTS �? 1 8 RTS �? 8

Whether a service is provisioned on an MSTP device: 1. Search and view related service trails to check whether the service trails are complete and activated. 2. Check whether abnormal alarms are reported for the service board. 3. Test the customer services.

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.

The pre-calculated latency of each WDM device is 100 μs. The latency of a fiber is 5 μs/km.

Yes, OTN equipment supports tangent ring networking.