Difference between revisions of "DS-30X"
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| Line 1: | Line 1: | ||
{{Infobox interface | {{Infobox interface | ||
| − | | name = DS- | + | | name = DS-30X |
| media = Copper | | media = Copper | ||
| nbr_signals = 4 | | nbr_signals = 4 | ||
Revision as of 15:47, 24 February 2017
| DS-30X | |
| Media | Copper |
|---|---|
| # of Signals | 4 |
| Symbol Rate | 2.56 MBaud |
| Variants | DS-30, 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
DS-30X Timing Diagram/Frame Format
References
- ↑
Circuit Card Fundamentals, Page 25
