IT1222881B - Sequence synchroniser for TDM duplex sequence restoration circuit - Google Patents
Sequence synchroniser for TDM duplex sequence restoration circuitInfo
- Publication number
- IT1222881B IT1222881B IT22236/87A IT2223687A IT1222881B IT 1222881 B IT1222881 B IT 1222881B IT 22236/87 A IT22236/87 A IT 22236/87A IT 2223687 A IT2223687 A IT 2223687A IT 1222881 B IT1222881 B IT 1222881B
- Authority
- IT
- Italy
- Prior art keywords
- sequence
- control units
- tdm
- synchroniser
- digital
- Prior art date
Links
- 238000005259 measurement Methods 0.000 abstract 2
- 238000004458 analytical method Methods 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 230000011664 signaling Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/14—Monitoring arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Safety Devices In Control Systems (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
Abstract
The TDM synchronisation appts. operates with digital measurement fields are connected by digital control units (15,15') and interurban lines by analogue control units (17,17'), all under the supervision of a peripheral processor (70). In each duplex pair of digital control units (15,15'), one analyses the group, of digital measurement fields for the correct sequence synchronisation as a duty unit while the other ats as a standby. The synchronising unit incorporates a clock for time period signalling to a timer which transmits a counting signal at a predetermined frequency. A state machine responds to the counting signal and to sequence alarm signals from both control units.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US92504386A | 1986-10-30 | 1986-10-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8722236A0 IT8722236A0 (en) | 1987-10-13 |
IT1222881B true IT1222881B (en) | 1990-09-12 |
Family
ID=25451116
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT22236/87A IT1222881B (en) | 1986-10-30 | 1987-10-13 | Sequence synchroniser for TDM duplex sequence restoration circuit |
Country Status (2)
Country | Link |
---|---|
BE (1) | BE1000172A6 (en) |
IT (1) | IT1222881B (en) |
-
1987
- 1987-10-13 IT IT22236/87A patent/IT1222881B/en active
- 1987-10-26 BE BE8701217A patent/BE1000172A6/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
IT8722236A0 (en) | 1987-10-13 |
BE1000172A6 (en) | 1988-07-05 |
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