STM-technology (SDH, PDH)

Useful containers

Useful containers are transmission paths of a defined capacity.

Temporary element

Temporary containers represent internal structures that are used for the reception of additional transport containers.

A typical characteristic of temporary containers as compared to SDH pipes is that they do not have cross-connects.

Temporary containers are automatically created on using logical structures, when the transport container to be used is not directly included into the hierarchy above the occupying transport container.

Bearers

Bearers are auxiliary containers that were necessary to further connect transport containers via physical paths. Their use is no longer necessary since Version 5.0MR!!!

Pseudosection

A pseudosection  is an SDH path with only one port allocation. Pseudosections are useful tools for the documentation of transfer interfaces.

Concatenation

A concatenation transport container is a transfer path composed of a group of smaller transport containers (routing elements) that may be interconnected asynchronously.

e.g.:  

    Concat-TC:        2.5 ISDN (160 Kbits)

    Element 1:        E0 64 Kbits

    Element 2:        E0 64 Kbits

    Element 3:        32 Kbits

Routing element

Routing elements are transport containers that are allocated to a concatenation TC. If this allocation is removed, the transport container becomes a “useful container” again.

Mux internal

“MUX Internal”  are MUX internal transport containers.