1. A system for controlling the flow of data traffic through a network, said system comprised of:
an access control system (ACS) including at least a processor executing an access control algorithm;
an aggregation packet switch having at least one trunk port and at least one network port, wherein said aggregation packet switch is connected to at least one protected link via said at least one trunk port and is connected to the network via said at least one network port, said trunk port configured to aggregate data traffic received via the at least one network port;
one or more user-to-network interfaces (UNIs) that are configured to connect customer equipment to the network through one or more communication paths that transport data traffic between the aggregation packet switch and the UNIs, each communication path configured to carry data traffic including a plurality of classes of service; and
a management interface over a dedicated management network configured to carry management traffic and connected to the access control system, the aggregation packet switch and the one or more UNIs,
wherein said ACS monitors data traffic on said trunk port and when a certain data traffic threshold value is reached the access control algorithm selects at least one communication path of the one or more communication paths and sends a first message via the management interface to the respective one or more UNIs associated with the selected at least one communication path to limit data traffic of a particular class of service on the selected at least one communications path to a lower amount of data traffic.
2. The system of claim 1, wherein said data traffic is limited based on said class of service.
3. The system of claim 1, wherein said data traffic having a lower priority class of service is limited before data traffic having a higher priority class of service.
4. The system of claim 1, wherein said ACS continues to monitor the data traffic on the trunk port and if the data traffic threshold value is still detected to be exceeded, the access control algorithm selects at least one additional communication path of the one or more communication paths and sends a message to the respective one or more UNIs associated with the selected at least one additional communication path to limit data traffic on the selected at least one additional communication path to a lower level.
5. The system of claim 1, wherein said ACS continues to monitor the data traffic on the trunk port and if the data traffic threshold value is no longer exceeded, the access control algorithm send a second message to the respective one or more UNIs associated with the selected at least one communication path to increase allowable data traffic on the selected at least one communications path.
6. The system of claim 5, wherein the allowable data traffic is increased based on a class of service of the data traffic.
7. The system of claim 1, wherein the network is a packet switched network.
8. The system of claim 1, wherein the one or more communications paths include one or more virtual connections through the network.
9. A method of controlling data traffic congestion, said method comprising:
determining whether a trunk port connected to a bandwidth-limited link and aggregating data traffic received from one or more user-network interfaces (UNIs) over one or more communication paths through a network is experiencing data traffic congestion;
if said trunk port is experiencing data traffic congestion, then performing the following steps,
A. selecting at least one of the one or more UNIs based at least in part on which of the one or more UNIs transmit the largest amount of data traffic having a first class of service of a plurality of classes of service;
B. sending a first message over a dedicated management network configured to carry management traffic via a management interface to each selected at least one UNI to limit transmission of data traffic having the first class of service to a specified amount of data traffic;
C. re-evaluating whether said trunk port is still experiencing data traffic congestion and, if so, repeating steps A and B, above, wherein selecting at least one of the one or more UNIs based at least in part on which of the UNIs transmit the largest amount of data traffic having a second class of service of the plurality of classes of service, wherein the second class of service is higher priority than the first class of service.
10. The method of claim 9, wherein the network is a packet switched network.
11. The method of claim 9, wherein if said trunk port is not experiencing data traffic congestion, then said method further comprises the step of:
determining whether the selected at least one UNI has limited data traffic in any of the plurality of classes of service and, if so, sending a second message to the selected at least one UNI to remove the limitation on transmission of data traffic in one of the limited classes of service.
12. The method of claim 11, wherein the one of the limited classes of service is a highest class of service of the limited classes of service.
13. A computer-readable medium storing instructions executable by a processor and configured to perform the method of claim 9 when executed by the processor.
14. A method comprising:
monitoring data traffic processed by a trunk port of a aggregation packet switch and data traffic transmitted by one or more user network interfaces (UNIs) that are connected to the aggregation packet switch via respective one or more virtual channels through a network, said monitoring including tracking at least one of an amount of data traffic transmitted by the one or more UNIs, an amount of data traffic processed by the trunk port, and an importance of the one or more virtual channels, wherein the data traffic transmitted by the one or more UNIs is associated with a plurality of classes of service;
detecting congestion of the trunk port, including determining whether said data traffic processed by said trunk port exceeds a threshold value;
selecting at least one first UNI of the one or more UNIs based on the amount of data traffic transmitted by the one or more UNIs, at least one class of service of the data traffic transmitted by the one or more UNIs, and the importance of the respective one or more virtual connections;
sending a first message over a dedicated management network configured to carry management traffic via a management interface to the selected at least one UNI to limit the data traffic transmitted by said selected at least one first UNI having a first class of service of the plurality of classes of service to a lower amount of data traffic.
15. The method of claim 14, further comprising:
after sending the first message, detecting said trunk port is still congested; and
selecting at least one second UNI of the one or more UNIs based on at least one of the amount of data traffic transmitted by the one or more UNIs, at least one non-limited class of service of the data traffic transmitted by the one or more UNIs, and the importance of the respective one or more virtual connections;
sending a second message to the selected at least one second UNI to limit the data traffic transmitted by said selected at least one second UNI having the second class of service of the at least one non-limited class of service.
16. The method of claim 14, further comprising:
after sending the first message, detecting said trunk port is no longer congested; and
sending a third message to the selected at least one first UNI to remove the limit on the data traffic transmitted by said selected at least one first UNI having the first class of service.
17. A processor-readable medium comprising instructions executable by a processor and configured to cause the processor to perform the method of claim 14 when executed by the processor.
18. The system of claim 1, wherein the data traffic of the particular class of service is limited by policing data traffic of the particular class of service on the at least one communication path to the lower level of data traffic.
19. The method of claim 9, wherein the data traffic of the first class of service is limited by policing data traffic of the first class of service transmitted by each said selected at least one UNI to the specified amount of data traffic.
20. The method of claim 14, wherein the data traffic of the first class of service is limited by policing data traffic of the first class of service transmitted by said selected at least one first UNI to the lower amount of data traffic.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A universal digging tooth attachment apparatus adapted to be secured to a lip portion of a ground engaging implement, said universal digging tooth attachment comprising:
a first element having an elongate section defining a first generally planar surface for abutting and engaging with one face of the bottom wall of said earth moving implement when said first element is secured thereto;
a second element having an elongate section defining a second generally planar surface for abutting and engaging with a second face of the bottom wall of said earth moving implement directly opposite from said elongate section of said first element when said second element is secured to said earth moving implement;
with one of said first and second elements having an earth engaging tooth projecting therefrom; and
wherein said first and second elements are interconnected to each other by a slip joint allowing for variable positioning of the first and second elements relative to each other and thereby permitting adjustment of a distance between said first and second planar surfaces while maintaining said first and second elements interconnected to each other throughout the range of adjustment.
2. The universal digging tooth attachment apparatus according to claim 1, wherein the elongate section of both of said first and second elements defines a longitudinally elongated slot therein.
3. The universal digging tooth attachment apparatus according to claim 1, wherein the elongate section of at least one of said first and second elements includes generally vertical side walls extending along a major lengthwise portion thereof, and with each side wall being configured to facilitate securement of said elongate section to the respective face of the bottom wall of said earth moving implement.
4. The universal digging tooth attachment apparatus according to claim 1, wherein the slip joint includes cooperating instrumentalities on said first and second elements for establishing a plurality of vertically spaced fulcrum supports about which the first and second elements can be adjusted relative to each other.
5. The universal digging tooth attachment apparatus according to claim 1, wherein said slip joint includes a generally vertical open sided channel defined by one of said first and second elements and a guide element carried by the other of said first and second elements and projecting into said open channel, with said guide element being movable within predetermined limits defined by said channel so as to allow for variable positioning of the first and second elements relative to each other and thereby permitting adjustment of the distance between the generally planar surfaces of said first and second elements.
6. The universal digging tooth attachment apparatus according to claim 5, wherein the generally vertical channel in one of said first and second elements includes a series of vertically spaced slotways forming adjustable fulcrum supports for said guide, with said vertically adjacent slotways being joined to each other by a guideway so as to permit said guide to be moved between adjacent slotways.
7. The universal digging tooth attachment apparatus according to claim 1, wherein said first element further includes a nose portion extending from said elongated section for releasably mounting said earth engaging tooth thereon.
8. A universal digging tooth attachment apparatus adapted to be secured to a lip portion of an earth moving implement, said universal digging tooth attachment comprising:
a multipiece adapter including a body section with a nose portion configured to releasably accommodate a ground engaging tooth thereon, a first element having an elongate section, said elongate section on said first element defining a first generally planar surface adapted to abut and engage with one face of the lip portion of said earth moving implement, and a second element having an elongate section defining a second generally planar surface adapted to abut and engage with a second face of the lip portion of said earth moving implement directly opposite from said elongate section of said first element when said multipiece adapter is secured to the lip portion of said earth moving implement; and
wherein the two elements of said adapter are interconnected to each other by a slip joint allowing for variable vertical adjustment of first and second planar surfaces relative to each other while maintaining said two elements of said adapter in interconnected and generally parallel relation relative to each other regardless of their adjusted position relative to each other.
9. The universal digging tooth attachment apparatus according to claim 8, wherein the body section of said multipiece adapter is formed integral with one of said elements, and wherein each elongate section of the two elements of said adapter defines an opening therein, with said opening having a closed margin for allowing a fastener to extend therethrough.
10. The universal digging tooth attachment apparatus according to claim 9, wherein the elongate section of each element of said adapter defines, as an integral part thereof, a series of spaced ridges on that surface of the elements opposed to the generally planar surface, with said spaced ridges extending generally parallel relative to each other and away from the closed margin of said opening.
11. The universal digging tooth attachment apparatus according to claim 8, wherein the elongate section of at least one of two elements of said adapter includes generally vertical side walls extending along a major lengthwise portion of said elongate section, and with each side wall being configured with an angled surface to facilitate securement of said elongate section to the respective face of the lip portion of said earth moving implement.
12. The universal digging tooth attachment apparatus according to claim 8, wherein the body section of said multipiece adapter is formed integral with one of said elements, and wherein said slip joint includes cooperating instrumentalities on multipiece adapter for establishing a plurality of vertically spaced fulcrum supports about which the first and second adapter elements can be pivotally adjusted relative to each other.
13. The universal digging tooth attachment apparatus according to claim 8, wherein the body section of said multipiece adapter is formed integral with one of said elements, and wherein said body section of said multipiece adapter includes a pair of ear sections defining laterally spaced inner surfaces spaced apart by a predetermined distance, and wherein the other element of said multipiece adapter includes a projection having two laterally spaced outer surfaces arranged a predetermined distance apart, with the inner and outer surfaces on said first and second adapter elements defining cooperating instrumentalities forming said slip joint and which allow for variable positioning of the first and second adapter elements relative to each other and thereby permitting adjustment of the distance between the generally planar surfaces of said first and second adapter elements.
14. The universal digging tooth attachment apparatus according to claim 8, wherein said slip joint includes a generally vertical open-sided channel defined by said multipiece adapter and a fulcrum pin carried by an element of said adapter and projecting into said open-sided channel, with said fulcrum pin being movable within predetermined limits defined by said channel so as to allow for variable positioning of the pieces of said adapter relative to each other and thereby permitting adjustment of the distance between the generally planar surfaces of the pieces of said adapter.
15. A universal digging tooth attachment apparatus adapted to be secured to a lip portion of an earth moving implement, said universal digging tooth attachment comprising:
a multipiece adapter having a body section configured to releasably accommodate a ground engaging tooth thereon, a first piece having an elongate section connected to said body portion and defining a first generally planar surface for abutting and engaging with one face of the lip portion of said earth moving implement when said multipiece adapter is secured thereto, and a second piece having an elongate section defining a second generally planar surface for abutting and engaging with a second face of the lip portion of said earth moving implement directly opposite from said first elongate section when said multipiece adapter is secured to the lip portion of said earth moving implement; and
wherein the second elongate section of said multipiece adapter is interconnected to the body section of said adapter by a slip joint allowing for variable vertical adjustment of said first and second planar surfaces relative to each other while maintaining the body section and the second elongate section of said multipiece adapter in interconnected relation relative to each other throughout the range of adjustment of said multipiece adapter.
16. The universal digging tooth attachment apparatus according to claim 15, wherein the elongate section of both of said first and second pieces of said adapter defines an opening therein, and wherein said opening has a closed margin for allowing a fastener to extend therethrough.
17. The universal digging tooth attachment apparatus according to claim 15, wherein the first and second elongate sections of said multipiece adapter each define, as an integral part thereof, a series of spaced ridges on a surface thereof opposed to the generally parallel surface, and with said protrusions extending generally parallel relative to each other and away from the closed margin of said opening.
18. The universal digging tooth attachment apparatus according to claim 15, wherein said first and second pieces of said multipiece adapter includes generally vertical side walls extending along a major lengthwise portion thereof, and with each side wall being configured with an angled surface to facilitate securement of the elongate section to the respective face of the bottom wall of said earth moving implement.
19. The universal digging tooth attachment apparatus according to claim 15, wherein said slip joint includes cooperating instrumentalities on said second piece and said body section for establishing a plurality of vertically spaced fulcrum supports about which the first and second elongate sections of said multipiece adapter can be pivotally adjusted relative to each other.
20. The universal digging tooth attachment apparatus according to claim 15, wherein said slip joint includes a generally vertical open-sided channel defined by one of said second piece and said body section and a fulcrum pin carried by the other of said second piece and the body section, with said fulcrum pin projecting into said open-sided channel, and with said fulcrum pin being movable within predetermined limits defined by said channel so as to allow for variable positioning of the first and second elongate sections relative to each other and thereby permitting adjustment of the distance between the generally planar surfaces defined by said first and second elongate sections.
21. The universal digging tooth attachment apparatus according to claim 15, wherein the first piece of said multipiece adapter is interconnected to the body section of said adapter by a second slip joint which combines with the other slip joint on the adapter to allow for variable adjustment of the pitch of the nose portion of said multipiece adapter relative to the bottom wall of the earth moving implement.
22. The universal digging tooth attachment apparatus according to claim 21, wherein said second slip joint includes a generally vertical open-sided channel defined by one of said first piece and said body section and a fulcrum pin carried by the other of said first piece and the body section, with said fulcrum pin projecting into said open-sided channel, and with said fulcrum pin being movable within predetermined limits defined by said channel so as to allow for variable positioning of the first and second elongate sections relative to each other and thereby permitting adjustment of the distance between the generally planar surfaces defined by said first and second elongate sections.