TW238458B - Switching of balanced line-pairs in a cable management system with reduced number of crosspoint switches - Google Patents
Switching of balanced line-pairs in a cable management system with reduced number of crosspoint switchesInfo
- Publication number
- TW238458B TW238458B TW83103774A TW83103774A TW238458B TW 238458 B TW238458 B TW 238458B TW 83103774 A TW83103774 A TW 83103774A TW 83103774 A TW83103774 A TW 83103774A TW 238458 B TW238458 B TW 238458B
- Authority
- TW
- Taiwan
- Prior art keywords
- line
- service
- pairs
- board
- lines
- Prior art date
Links
Landscapes
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
- Structure Of Telephone Exchanges (AREA)
Abstract
A cable management system which provides routing of wired services between service lines (16) and user lines (18). Each service line enters the cable system at a service terminationunit circuit card (22) which also holds a portion of a crosspoint switch matrix (126). Each user line enters the system at a linetermination unit circuit card (20). The service termination unit circuit cards are all mounted to connectors (36) on a first side of a centerplane board (24) and the line termination unit circuit cards are mounted to connectors (36) on the other side of thecenterplane board. Pins (37) extending through the centerplaneboard interconnect the connectors on the opposed sides of thecenterplane board so that any service line can be connected to any user line. A system controller card (26) mounted to the centerplane board communicates with the circuit cards via a bus (38) on thecenterplane board. When the service lines and user lines are made up of balanced line-pairs (218, 224, 222, 226), in order to reduce the number of crosspoint switches (238) in the crosspoint switch matrix (228), the differential signals on the balanced line-pairs (218, 226) are converted to single-ended signals on individuallines (240). The individual lines are switched through the matrix and the signals thereon are then reconverted back to differential signals on balanced line-pairs (222, 224).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17343394A | 1994-01-25 | 1994-01-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
TW238458B true TW238458B (en) | 1995-01-11 |
Family
ID=51400747
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW83103774A TW238458B (en) | 1994-01-25 | 1994-04-27 | Switching of balanced line-pairs in a cable management system with reduced number of crosspoint switches |
Country Status (1)
Country | Link |
---|---|
TW (1) | TW238458B (en) |
-
1994
- 1994-04-27 TW TW83103774A patent/TW238458B/en active
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