- Transmux
TRANSMUX (Trans-Multiplexing) is a term to describe a signaling format change in telecommunications signaling between
SONET and asynchronousDS3 signals. ADS3 signal is multiplexed from 28 individualDS1 signals in a bit-interleaved fashion, with framing and overhead at determined intervals.SONET differs from this approach by using a byte-interleaved, synchronous, multiplexing technique with several variations on payload types.Usage
If a
DS3 signal is to be transported over aSONET path, it must be completely demultiplexed and remapped into theSONET format. This same action occurs in reverse when converting aSONET payload back into aDS3 at the opposite end of a path.Variations
If cross-connect capability is to be maintained at the
VT1.5 level, then the individual DS1 signals are extracted from a parentDS3 or electrical T1, and then transmuxed individually into eachVT1.5 . If aDS3 signal is to be delivered 'as-is' to aSONET drop, then the entireDS3 is transmuxed intact into an STS container and no subsequent cross-connect capability exists with theSONET payload at aVT1.5 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."
PMC-Sierra Strategy:
"Due to the explosive growth in new voice and data connections, transmux has emerged as a key transport service to support interworking between legacy and next-generation networks," said Dino Bekis, vice president of marketing for PMC-Sierra's Communications Products Division."
External links
* [http://www.whiterock.com/Products/VLX2020/ETS2TributaryShelf/tabid/81/Default.aspx White Rock Networks ETS2 Product Description]
References
* [http://www.analogzone.com/netp0502b.htm PMC-Sierra Transmux Solution]
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