Content added Content deleted
imported>DrOwl No edit summary |
imported>mutante mNo edit summary |
||
| (2 intermediate revisions by 2 users not shown) | |||
| Line 1: | Line 1: | ||
| ⚫ | SDH ('''Synchronous Digital Hierarchy''') is a standard technology for synchronous [[data]] transmission on [[optical media]]. It is the international equivalent of [[Synchronous Optical Network]]. Both technologies provide faster and less expensive network interconnection than traditional [[PDH]] ('''Plesiochronous Digital Hierarchy''') equipment. |
||
SDH |
|||
| ⚫ | |||
| ⚫ | SDH (Synchronous Digital Hierarchy) is a standard technology for synchronous data transmission on optical media. It is the international equivalent of Synchronous Optical Network. Both technologies provide faster and less expensive network interconnection than traditional PDH (Plesiochronous Digital Hierarchy) equipment. |
||
SDH uses the following Synchronous Transport Modules (STM) and rates: |
|||
| ⚫ | |||
SDH uses the following Synchronous Transport Modules (STM) and rates: STM-1 (155 megabits per second), STM-4 (622 Mbps), STM-16 (2.5 gigabits per second), and STM-64 (10 Gbps). |
|||
#STM-1 (155 megabits per second), |
|||
TcP |
|||
#STM-4 (622 Mbps), |
|||
#STM-16 (2.5 gigabits per second), and |
|||
#STM-64 (10 Gbps). |
|||
Related: [[TCP]] |
|||
[[Category:Computer]] |
|||
[[Category:Networking]] |
|||
Latest revision as of 19:06, 15 August 2005
SDH (Synchronous Digital Hierarchy) is a standard technology for synchronous data transmission on optical media. It is the international equivalent of Synchronous Optical Network. Both technologies provide faster and less expensive network interconnection than traditional PDH (Plesiochronous Digital Hierarchy) equipment.
In digital telephone transmission, "synchronous" means the bits from one call are carried within one transmission frame. "Plesiochronous" means "almost (but not) synchronous," or a call that must be extracted from more than one transmission frame.
SDH uses the following Synchronous Transport Modules (STM) and rates:
- STM-1 (155 megabits per second),
- STM-4 (622 Mbps),
- STM-16 (2.5 gigabits per second), and
- STM-64 (10 Gbps).
Related: TCP