# US 7,609,622 B2 · Communication system having enhanced reliability

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- Number: US 7,609,622 B2
- Document ID: US7609622B2
- Status: Granted
- Kind: B2
- Application number: 10/701,089
- Filed: 2003-11-04
- Published: 2004-05-13
- Granted: 2009-10-27
- Earliest claimed: 2003-11-04
- Assignees: Alcatel Lucent
- Inventors: Richard Marion Czerwiec; Richard Roger Rzonca; Marlin V. Simmering; Geert Van Wonterghem; Jan De Groote
- Web page: https://patentgrep.com/patent/US7609622B2

## CPC

- H04M 3/241: {for stored program controlled exchanges}
- H04B 1/74: for increasing reliability, e.g. using redundant or spare channels or apparatus {(replacing by standby devices for amplifiers H03F1/52, H03F1/542)}
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)
- H04B: TRANSMISSION

## Abstract

A method for a system including a plurality of encoders each for receiving a first signal and encoding to generate a respective second signal for sending to a respective subscriber, comprising receiving, in each encoder, the first signal from a first source, while testing a signal path between a second source and the encoders, the first source on a first assembly, the second source on a second assembly, and each encoder on a respective third assembly, while each encoder is receiving the first signal from the first source, receiving, in each encoder, a third signal from the second source, generating, from each encoder, a fourth signal based on the third signal, the fourth signal being a redundancy signal and receiving and examining the fourth signal at the second source and subsequently receiving the first signal from the second source.

## Claims

### Claim 1

A method for a system including a plurality of encoders each for receiving a first signal and encoding to generate a respective second signal for sending to a respective subscriber, the method comprising:
receiving, in each encoder, the first signal from a first source, while testing a signal path between a second source and the encoders, the first source on a first assembly, the second source on a second assembly, and each encoder on a respective third assembly;
while each encoder is receiving the first signal from the first source:
receiving, in each encoder, a third signal from the second source;
generating, from each encoder, a fourth signal based on the third signal, the fourth signal being a redundancy signal; and
receiving and examining the fourth signal at the second source; and
subsequently receiving the first signal from the second source.