Difference between revisions of "DS-30X"
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<wavedrom> | <wavedrom> | ||
{signal: [ | {signal: [ | ||
| + | {name: 'Frame Sync', wave: '1....h......'}, | ||
{ | { | ||
name: 'Data Words', | name: 'Data Words', | ||
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node: '.....AB.....', | node: '.....AB.....', | ||
}, | }, | ||
| − | |||
{node: '.C.........D'}, | {node: '.C.........D'}, | ||
{name: '5.12MHz', wave: 'p.......................', period: 0.5}, | {name: '5.12MHz', wave: 'p.......................', period: 0.5}, | ||
Latest revision as of 13:46, 29 March 2019
| DS-30X | |
| Media | Copper |
|---|---|
| # of Signals | 4 |
| Symbol Rate | 2.56 MBaud |
| Variants | DS-30, DS-30A, DS-30Y |
DS-30X Speech Links are used to carry speech and some signalling on Norstar Modular platforms.
Physical
- Four wires (arrows are controller <-> card) [1]
- Tx PCM →
- Rx PCM ←
- 5.12MHz Clock →
- 1kHz Frame Sync →
Electrical
- Signal levels unknown
- Isolation unknown
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
Timing Diagram/Frame Format
References
- ↑
CS1000 Circuit Card Fundamentals, Page 25
