Misconnection Avoidance on Networks
First Claim
1. A network, comprising:
- a first communication link;
a second communication link;
a first switch node having a first input interface coupled to the first communication link an output interface coupled to the second communication link, the first input interface receiving a first TDM frame having a first user payload field including a first user data and a frame overhead field including a first identification from the first communication link, the first input interface configured to validate the first identification and reject the first TDM frame responsive to the first identification being invalid, and pass the first user data to the output interface responsive to the first identification being valid, the output interface receiving the first user data and generating a second TDM frame having a second user payload field including the first user data, and a second frame overhead field including a second identification with the second identification being different from the first identification; and
a second switch node having a second input interface coupled to the second communication link and receiving the second TDM frame, the input interface of the second switch node configured to validate the second identification and reject the second TDM frame responsive to the second identification being invalid.
1 Assignment
0 Petitions
Accused Products
Abstract
A switch node provided with a switch, an input interface and an output interface. The input interface is adapted to couple to a first communication link to receive a first TDM frame having a user payload field containing a first user data from the first communication link, and a frame overhead field containing a first identification. The input interface is configured to validate the first identification in the frame overhead field and reject the first TDM frame responsive to the first identification being invalid, and to forward the first user data to the switch responsive to the first identification being valid. The output interface is adapted to couple to a second communication link. The output interface is configured to receive the first user data from the switch, and to generate a second TDM frame having a second user payload field containing the first user data, and a second frame overhead field containing a second identification that is different from the first identification. The output interface is also configured to transmit the second TDM frame onto the second communication link.
24 Citations
16 Claims
-
1. A network, comprising:
-
a first communication link; a second communication link; a first switch node having a first input interface coupled to the first communication link an output interface coupled to the second communication link, the first input interface receiving a first TDM frame having a first user payload field including a first user data and a frame overhead field including a first identification from the first communication link, the first input interface configured to validate the first identification and reject the first TDM frame responsive to the first identification being invalid, and pass the first user data to the output interface responsive to the first identification being valid, the output interface receiving the first user data and generating a second TDM frame having a second user payload field including the first user data, and a second frame overhead field including a second identification with the second identification being different from the first identification; and a second switch node having a second input interface coupled to the second communication link and receiving the second TDM frame, the input interface of the second switch node configured to validate the second identification and reject the second TDM frame responsive to the second identification being invalid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method, comprising the steps of:
-
receiving, by circuitry of an input interface of a switch node of a network having a first connection being a first path in the network, a TDM frame containing an identification in a frame overhead field of the TDM frame from the first connection; determining, by circuitry of the input interface, whether the identification is indicative of predetermined reserved timeslots; and rejecting at the input interface of the switch node the TDM frame responsive to the identification contained in the frame overhead field not matching the predetermined reserved timeslots. - View Dependent Claims (11, 12, 13)
-
-
14. A switch node, comprising:
-
a switch; an input interface for coupling to a first communication link to receive a first TDM frame having a user payload field containing a first user data from the first communication link, and a frame overhead field containing a first identification, the input interface configured to validate the first identification in the frame overhead field and reject the first TDM frame responsive to the first identification being invalid, and to forward the first user data to the switch responsive to the first identification being valid; and an output interface for coupling to a second communication link, the output interface configured to receive the first user data from the switch, and generate a second TDM frame having a second user payload field containing the first user data, and a second frame overhead field containing a second identification that is different from the first identification, and configured to transmit the second TDM frame onto the second communication link. - View Dependent Claims (15, 16)
-
Specification