Generic selectors
Exact matches only
Search in title
Search in content
Search in posts
Search in pages

Reply To: Microwave Transmission

#38339
patrick
Guest

Plesiochrone Digital Hierarchy.

Synchronus Digital Hierarchy.

PDH= No synchro.
signal goes from point A to point B

SDH= synchro, you can make a big network.
signal goes from point A to point B, C , D , …

The trame is standardized. STM1, STM4, … like TDMA, CDMA, …