Difference between revisions of "DS-30"
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(Adding more information about DS-30Y links) |
(Adding cite for DS-30X physical description.) |
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== DS-30X Physical == | == DS-30X Physical == | ||
| − | * Four wires (arrows are controller <-> card) | + | * Four wires (arrows are controller <-> card) <ref name="ds30xphy">[[File:NN43001-311_02.09_Installation_CirCrdFundamentals.pdf|page=25|25px]] Circuit Card Fundamentals, Page 25</ref> |
** Tx PCM → | ** Tx PCM → | ||
** Rx PCM ← | ** Rx PCM ← | ||
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</wavedrom> | </wavedrom> | ||
| + | == References == | ||
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[[Category:Interfaces]] | [[Category:Interfaces]] | ||
Revision as of 02:28, 24 February 2017
DS-30 (sometimes DS30) links are used to carry speech and signalling information on DMS, CS1000, Norstar, and BCM products.
Contents
Variants
- DS-30
- Used on DMS family products
- DS-30X
- Used on Norstar Modular platform to interconnect modules
- Unknown in what way it's different from other variants
- DS-30Y
- Used on CS1000E and Meridian 1 platforms
- Carries same traffic as DS-30X but can be combined in groups of 4 to make DS-30Y superloops
- Seems to only be used on smaller platforms (non-DMS), possibly predecessor or smaller alternative to DS-512 links?
DS-30X Physical
- Four wires (arrows are controller <-> card) [1]
- Tx PCM →
- Rx PCM ←
- 5.12MHz Clock →
- 1kHz Frame Sync →
DS-30X Electrical
- Signal levels unknown
- Isolation unknown
DS-30X Logical
- Clocked at 2.56MHz (half the 5.12MHz clock received from the controller)
- Carries 32 channels of PCM voice data
- Each channel consists of a 10-bit word
- 8 bits of voice data (called a "timeslot")
- 1 bit of signalling data
- 1 bit indicating "data valid"
- Signalling data is sent in 24-bit words, one bit at a time in each channel.
- Sent in both directions, one on Tx PCM and one on Rx PCM
DS-30X Timing Diagram/Frame Format
References
- ↑
Circuit Card Fundamentals, Page 25
