SDH

Noun

Meaning

Initialism of synchronous digital hierarchy.

(medicine) Initialism of subdural hematoma.

Initialism of subtitles for the deaf and hard of hearing.

Source: en.wiktionary.org

Examples

Although the SONET standards were developed before SDH, it is considered a variation of SDH because of SDH's greater worldwide market penetration. Source: Internet

Both SONET and SDH can be used to encapsulate earlier digital transmission standards, such as the PDH standard, or they can be used to directly support either Asynchronous Transfer Mode (ATM) or so-called packet over SONET/SDH (POS) networking. Source: Internet

Equipment With advances in SONET and SDH chipsets, the traditional categories of network elements are no longer distinct. Source: Internet

For both SONET and SDH, this is often represented by displaying the frame graphically: as a block of 90 columns and nine rows for STS-1, and 270 columns and nine rows for STM1/STS-3c. Source: Internet

Generally, section overhead (regenerator section in SDH) is used. Source: Internet

It was developed to allow streams 1.544 Mbit/s and above to be multiplexed, in order to create larger SDH frames known as Synchronous Transport Modules (STM). Source: Internet

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