Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
156 words
A telecommunications transmission security arrangement comprising first and second transmission paths, each path having first and second serially connected circuit means said first circuit means of said first path being arranged to be connectable to said second circuit means of said second path, and, said first circuit means of said second path being arranged to be connectable to said second circuit means of said first path, the second circuit means of each path are arranged to monitor alarm conditions of the transmission paths and set up a transmission path by way of the first circuit means of the first path and the second circuit means of the second path when the first path is determined not suitable for transmission, and, to set up a transmission path by way of the first circuit means of the second path and the second circuit means of the first path when the second path is determined not suitable for transmission.
Claim 2
Dependent Claim
156 words
A telecommunications transmission security arrangement comprising first and second transmission paths, each path having first and second serially connected circuit means said first circuit means of said first path being arranged to be connectable to said second circuit means of said second path, and, said first circuit means of said second path being arranged to be connectable to said second circuit means of said first path, the second circuit means of each path are arranged to monitor alarm conditions of the transmission paths and set up a transmission path by way of the first circuit means of the first path and the second circuit means of the second path when the first path is determined not suitable for transmission, and, to set up a transmission path by way of the first circuit means of the second path and the second circuit means of the first path when the second path is determined not suitable for transmission.
Claim 3
Dependent Claim
23 words
A security arrangement as claimed in claim 1, wherein an arrangement is provided at opposite ends of the first and second transmission paths.
Claim 4
Dependent Claim
22 words
A security arrangement as claimed in claim 1, wherein the arrangement is connected to a dual path counter rotating transmission ring system.
Claim 5
Dependent Claim
32 words
A security arrangement as claimed in claim 3, wherein connection to the ring system is made by way of a multiplexer which is connected to the second circuit means of the arrangement.
Claim 6
Dependent Claim
15 words
A security arrangement as claimed in claim 4, wherein the multiplexer is and add/drop multiplexer.
Claim 7
Dependent Claim
55 words
A security arrangement as claimed in claim 5, wherein the add/drop multiplexer comprises two substantially identical circuit arrangements, a first of which is arranged to transfer traffic to and from an upper transmission rate synchronous stream and the second of which is arranged to transfer traffic to and from a lower transmission rate synchronous stream.
Claim 8
Dependent Claim
36 words
A security arrangement as claimed in claim 6, wherein each circuit arrangement includes a column interchange switching arrangement which transfers a number of tributaries from the ring system to an intermediate interface in a defined order.