TRANSMUX (Transcode-Multiplexing) is a signaling format change in telecommunications signaling between synchronous optical network signals

SONET Synchronous Optical Networking (SONET) and Synchronous Digital Hierarchy (SDH) are standardized protocols that transfer multiple digital bit streams synchronously over optical fiber using lasers or highly coherent light from light-emitting diodes ...

and asynchronous DS3 signals. A DS3 signal is multiplexed from 28 individual DS1 signals in a bit-interleaved fashion, with framing and overhead at determined intervals.

differs from this approach by using a byte-interleaved, synchronous, multiplexing technique with several variations on payload types.

Usage

SONET payload can carry multiplexed lower rate streams (DS1, E1, DS3, etc.) as well as any octet-based format such as TCP/IP, ATM, frame relay, Ethernet, etc.

Variations

If cross-connect capability is to be maintained at the VT1.5 level, then the individual DS1 signals are extracted from a parent DS3 or electrical T1, and then transmuted individually into each VT1.5. If a complete DS3 signal is to be delivered to a

drop, then the entire DS3 is transmuted intact into an STS container and no subsequent cross-connect capability exists with the

payload at a VT1.5 level.

Industry application

White Rock Networks Description of a product with Transmux Support: ''"For applications where conversion between DS3 and VT1.5 mapped STS-1s is required, transmux allows DS3 embedded within an STS-1 circuit to be adapted to a VT1.5 mapped STS-1 without physically terminating the circuit as a DS3 or EC-1."''

External links

White Rock Networks ETS2 Product Description

References

vision2mobile.com - Transmuxing Article
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