PT84532A - PCM telephone transmission circuitry - serves synchronised transmitters with send and test channels for rapid checking of bit errors - Google Patents
PCM telephone transmission circuitry - serves synchronised transmitters with send and test channels for rapid checking of bit errorsInfo
- Publication number
- PT84532A PT84532A PT8453287A PT8453287A PT84532A PT 84532 A PT84532 A PT 84532A PT 8453287 A PT8453287 A PT 8453287A PT 8453287 A PT8453287 A PT 8453287A PT 84532 A PT84532 A PT 84532A
- Authority
- PT
- Portugal
- Prior art keywords
- send
- serves
- channel
- bit errors
- transmission circuitry
- Prior art date
Links
Landscapes
- Time-Division Multiplex Systems (AREA)
Abstract
Between transmitters (K1..Kn) and the transmission channel (C) clock pulse controlled converters regenerate the binary signals when entered into the transmission channel. In addition a test channel (Z) is provided into which the transmitted binary signals are fed directly, and without passing through the transmitted binary signals are fed directly, and without passing through the converters. Transmission to the channels (C,Z) is via separate concentrators (X1,..Xm,Y) for the test channel (Z) and (A1..Am) for the transmission channel (C). The information from the test channel is fed back to the transmitter and compared with the original for parity, bit for bit. Thus the signal sent (L1,P1,A...B) to the transmission channel (C) is compared with the original as recovered from the test channel (Z) through its return path (e). This check takes place between two timing pulses.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3636698 | 1986-10-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
PT84532A true PT84532A (en) | 1987-04-01 |
PT84532B PT84532B (en) | 1989-11-10 |
Family
ID=6312671
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PT8453287A PT84532B (en) | 1986-10-28 | 1987-03-20 | SYSTEM OF CIRCUITS FOR TELECOMMUNICATIONS INSTALLATIONS WITH MODULATION BY IMPULSES AND CODING (PCM), IN ESPECIAL INSTALLATIONS OF TELECOMMUNICATION PCM, WITH SEVERAL EMISSIONS EMISSIONS COMMANDED BY CADCUIC IMPULSES FOR COMMON EMISSION CHANNEL |
Country Status (1)
Country | Link |
---|---|
PT (1) | PT84532B (en) |
-
1987
- 1987-03-20 PT PT8453287A patent/PT84532B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
PT84532B (en) | 1989-11-10 |
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MM3A | Annulment or lapse |
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