Adtran Gmbh

Joseph Lee Boyd

Andrew T Ruble

Eric Malcolm Rives

Richard Paul King

Methods and apparatus for communicating synchronous digital signals through an asynchronous domain are disclosed. In one aspect a method includes receiving a first synchronous digital signal of a first domain, wherein the first synchronous digital signal is generated by a first device for communication to a second device; encapsulating the first synchronous digital signal of the first domain into a first asynchronous packet of a second domain; and transmitting the first asynchronous packet to an asynchronous network of the second domain.

Synchronous digital signal encapsulation

The present disclosure generally pertains to network systems and methods that efficiently drop packets carried by virtual circuits. In one exemplary embodiment, a packet network has at least a first node having a first port that is coupled directly to a second port of a second node. A virtual circuit is established such that a virtual connection exists between the two ports. The first node communicates with the second node to determine whether the second node is provisioned such that the second port is a member of the virtual circuit. If the second node is not provisioned such that the second port is a member of the virtual circuit, then the first node drops the data packets that (1) are carried by the virtual circuit and (2) are to be forwarded to the first port, as indicated by virtual circuit (VC) mapping data in the first node. Thus, the dropped packets are prevented from usurping capacity that otherwise could be used to transmit other packets between the two nodes.

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Harvest, AL, United States of America

Joseph Lee Boyd