Time division multiplexing system
US4410980A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1981 |
| Grant date | Oct 18, 1983 |
| Priority date | — |
| Expiry date | Jul 31, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/4912
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a time division multiplexing system for multiplexing a plurality of channels having mutually-independent bit rates, the improvement wherein the pulse signals of each channel are converted into codes so that the information "1" is represented by a pulse having a width of two consecutive transmission clock periods ("0,0" or "1,1") the information "0" is represented by a pluse having a width of a single transmission clock period ("0" or "1"), and polarities of adjacent pulses are always different from each other; the pulse signals are compressed time-wise in a frame unit; and a frame synchronizing signal and a channel synchronizing signal, each consisting of marks or spaces having a duration of at least three consecutive transmission clock periods, are added to the intervals between the time-compressed frames to thereby perform time division multiplexing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.