Difference between revisions of "DS-30"

Revision as of 02:07, 24 February 2017

DS-30 (sometimes DS30) links are used to carry speech and signalling information on DMS, CS1000, Norstar, and BCM products.

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?

Four wires (arrows are controller <-> card)
- Tx PCM →
- Rx PCM ←
- 5.12MHz Clock →
- 1kHz Frame Sync →

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

@@ Line 8: / Line 8: @@
 ** Unknown in what way it's different from other variants
 * DS-30Y
-** Used on CS1000E platform
+** Used on CS1000E and Meridian 1 platforms
-** Unknown in what way it's different from other variants
+** 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 ==
@@ Line 20: / Line 21: @@
 == DS-30X Electrical ==
 * Signal levels unknown
+* Isolation unknown
 == DS-30X Logical ==