Method and a system for redundancy control of baseband channels in a telecommunications system

Claim 1

A method for performing redundancy control of either of two respective baseband primary channel interfaces of respective pairs of mutually substantially identical receivers in a digital transmission system including a respective line serving each said interface and which when being used for transmitting serves as a far end of a transmission line for a primary channel and when being used for receiving serves as a near end of a transmission line for a primary channel, comprising the steps of: monitoring the quality of a signal transmitted in a respective transmission direction and received by a respective said receiver interfaced to said system by a respective said baseband primary channel interface at a respective near end of the transmission line; monitoring a possible failure indication or alarm signal concerning the respective transmission direction at the respective far end; performing a failure situation comparison between the mutually redundant receivers of the respective said pair; performing redundancy control of the baseband primary channel interface of the mutually redundant receivers of the respective pair on the basis of said failure situation comparison, so that the signal from the respective one of the receivers of the respective pair which provides a higher quality of output is transmitted in the respective said transmission direction towards the primary channel.

Claim 2

A method for performing redundancy control of either of two respective baseband primary channel interfaces of respective pairs of mutually substantially identical receivers in a digital transmission system including a respective line serving each said interface and which when being used for transmitting serves as a far end of a transmission line for a primary channel and when being used for receiving serves as a near end of a transmission line for a primary channel, comprising the steps of: monitoring the quality of a signal transmitted in a respective transmission direction and received by a respective said receiver interfaced to said system by a respective said baseband primary channel interface at a respective near end of the transmission line; monitoring a possible failure indication or alarm signal concerning the respective transmission direction at the respective far end; performing a failure situation comparison between the mutually redundant receivers of the respective said pair; performing redundancy control of the baseband primary channel interface of the mutually redundant receivers of the respective pair on the basis of said failure situation comparison, so that the signal from the respective one of the receivers of the respective pair which provides a higher quality of output is transmitted in the respective said transmission direction towards the primary channel.

Claim 5

A system for performing redundancy control of either of two respective baseband primary channel interfaces of respective pairs of mutually substantially identical receivers in a digital transmission system including a respective line serving each said interface and which when being used for transmitting serves as a far end of a transmission line for a primary channel and when being used for receiving serves as a near end of a transmission line for a primary channel, comprising: a respective computer operatively associated with each said receiver; a respective communication bus provided between the respective two said computers associated with said receivers of each said pair of receivers in order to enable monitoring of the quality of a signal received from the transmission line and a possible failure indication or alarm signal concerning the transmission direction at the far end of the transmission line, compare failure situations of the respective receivers, and perform redundancy control of the baseband primary channel interface of the respective receivers on the basis of said comparison of the failure situations and cause the signal with higher quality of output to be transmitted towards the primary channel in the respective said transmission direction.

Claim 6

A system for performing redundancy control of either of two respective baseband primary channel interfaces of respective pairs of mutually substantially identical receivers in a digital transmission system including a respective line serving each said interface and which when being used for transmitting serves as a far end of a transmission line for a primary channel and when being used for receiving serves as a near end of a transmission line for a primary channel, comprising: a respective computer operatively associated with each said receiver; a respective communication bus provided between the respective two said computers associated with said receivers of each said pair of receivers in order to enable monitoring of the quality of a signal received from the transmission line and a possible failure indication or alarm signal concerning the transmission direction at the far end of the transmission line, compare failure situations of the respective receivers, and perform redundancy control of the baseband primary channel interface of the respective receivers on the basis of said comparison of the failure situations and cause the signal with higher quality of output to be transmitted towards the primary channel in the respective said transmission direction.