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| − | DS-30 (sometimes DS30) links are used to carry speech and signalling information on DMS, CS1000, Norstar, and BCM products.
| + | {{Infobox interface |
| − | | + | | name = DS-30 |
| − | == Variants ==
| + | | media = Copper |
| − | * DS-30
| + | | nbr_signals = 4? |
| − | ** Used on DMS family products
| + | | symbol_rate = 2.56 MBaud? |
| − | * DS-30X
| + | | variants = [[DS-30A]], [[DS-30X]], [[DS-30Y]] |
| − | ** Used on Norstar Modular platform to interconnect modules
| + | }} |
| − | ** Unknown in what way it's different from other variants
| + | DS-30 (sometimes DS30) links are used to carry speech and signalling information on DMS family products. Little public documentation has been found about them, see other variants for more information on similar links. |
| − | * DS-30Y
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| − | ** Used on CS1000E and Meridian 1 platforms
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| − | ** Carries same traffic as DS-30X but can be combined in groups of 4 to make DS-30Y superloops
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| − | ** Seems to only be used on smaller platforms (non-DMS), possibly predecessor or smaller alternative to [[DS-512]] links?
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| − | | |
| − | == DS-30X Physical ==
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| − | * 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>
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| − | ** Tx PCM →
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| − | ** Rx PCM ←
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| − | ** 5.12MHz Clock →
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| − | ** 1kHz Frame Sync →
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| − | | |
| − | == DS-30X Electrical ==
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| − | * Signal levels unknown
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| − | * Isolation unknown
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| − | | |
| − | == DS-30X Logical ==
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| − | * Clocked at 2.56MHz (half the 5.12MHz clock received from the controller)
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| − | * Carries 32 channels of PCM voice data
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| − | * Each channel consists of a 10-bit word
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| − | ** 8 bits of voice data (called a "timeslot")
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| − | ** 1 bit of signalling data
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| − | ** 1 bit indicating "data valid"
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| − | * Signalling data is sent in 24-bit words, one bit at a time in each channel.
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| − | ** Sent in both directions, one on Tx PCM and one on Rx PCM
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| − | | |
| − | == DS-30X Timing Diagram/Frame Format ==
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| − | <wavedrom>
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| − | {signal: [
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| − | {
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| − | name: 'Data Words',
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| − | wave: '============',
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| − | data: ['Ch 27', 'Ch 28', 'Ch 29', 'Ch 30', 'Ch 31', 'Ch 0', 'Ch 1', 'Ch 2', 'Ch 3', 'Ch 4', 'Ch 5', 'Ch 6'],
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| − | node: '.....AB.....',
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| − | },
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| − | {name: 'Frame Sync', wave: '1....h......'},
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| − | {node: '.C.........D'},
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| − | {name: '5.12MHz', wave: 'p.......................', period: 0.5},
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| − | {name: '2.56MHz', wave: 'p...........'},
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| − | {name: 'Frame Sync', wave: '1nh.........', phase: 1.1},
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| − | {
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| − | name: 'Data Bits',
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| − | wave: '533333333453',
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| − | data: ['Ch31 DV', 'Ch0 Bit7', 'Ch0 Bit6', 'Ch0 Bit5', 'Ch0 Bit4', 'Ch0 Bit3', 'Ch0 Bit2', 'Ch0 Bit1', 'Ch0 Bit0',
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| − | 'Ch0 Sig', 'Ch0 DV', 'Ch1 Bit7']
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| − | },
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| − | {node: '.E.........F'},
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| − | ],
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| − | edge: [
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| − | 'A-C', 'B-D', 'C-E', 'D-F',
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| − | ],
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| − | foot: {
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| − | text: ['tspan', 'Sig = Signalling Bit, DV = Data Valid Bit']
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| − | },
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| − | config: {
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| − | hscale: 2
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| − | }
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| − | }
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| − | </wavedrom>
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| − | | |
| − | == References ==
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| − | <references />
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| | | | |
| | [[Category:Interfaces]] | | [[Category:Interfaces]] |
