A method for selecting a mode of operation for at least two modems is described. First, a handshake procedure is performed in order to determine a set of possible modes of operation supported by said modems. From said set of possible modes of operation, a set of favorable modes of operation is deriv
A method for selecting a mode of operation for at least two modems is described. First, a handshake procedure is performed in order to determine a set of possible modes of operation supported by said modems. From said set of possible modes of operation, a set of favorable modes of operation is derived. In case there exist two or more favorable modes of operation, a probing-based selection is performed that comprises evaluating respective performances of said favorable modes of operation. The favorable mode of operation with the best performance is selected as a resultant mode of operation.
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1. A method for selecting a resultant mode of operation for at least two modems that communicate via a communications network, comprising: (a) determining a set of possible modes of operation supported by the at least two modems;(b) selecting a first set of favorable modes of operation from among th
1. A method for selecting a resultant mode of operation for at least two modems that communicate via a communications network, comprising: (a) determining a set of possible modes of operation supported by the at least two modems;(b) selecting a first set of favorable modes of operation from among the set of possible modes of operation using a first level of priority-based selection based upon priorities assigned to a first criteria;(c) selecting a second set of favorable modes of operation from among the first set of favorable modes of operation using a second level of priority-based selection based upon priorities assigned to a second criteria; and(d) in case there exist two or more second favorable modes of operation from among said second set of favorable modes of operation, performing a probing-based selection by evaluating respective performances of each of the second favorable modes of operation to determine the resultant mode of operation. 2. The method of claim 1, wherein step (a) comprises: (a)(i) performing a handshake procedure to determine the set of possible modes of operation supported by the at least two modems. 3. The method of claim 1, wherein the first criteria and the second criteria are annexes and protocol standards, respectively, that are supported by the at least two modems. 4. The method of claim 3, wherein step (b) comprises: (b)(i) selecting the first set of favorable modes of operation using the first level of priority-based selection based on priorities assigned to the annexes. 5. The method of claim 3, wherein step (c) comprises: (c)(i) selecting the second set of favorable modes of operation using the second level of priority-based selection based on priorities assigned to the protocol standards. 6. The method of claim 1, wherein step (d) comprises: (d)(i) selecting a second favorable mode of operation with a best performance from among the second set of favorable modes as the resultant mode of operation. 7. The method of claim 6, wherein step (d)(i) comprises: (d)(i)(A) determining line conditions for each of the second favorable modes of operation. 8. The method of claim 7, wherein step (d)(i) further comprises: (d)(i)(B) deriving a performance index for each of the second favorable modes of operation from the line conditions; and(d)(i)(C) selecting a second favorable mode of operation with a highest best performance index from among the second set of favorable modes as the resultant mode of operation. 9. The method of claim 8, wherein step (d)(i)(A) comprises: (d)(i)(A)(1) determining a signal-to-noise ratio for each of the second favorable modes of operation to derive the performance index. 10. The method of claim 8, wherein step (d)(i)(A) comprises: (d)(i)(A)(1) determining an upstream bit rate and a downstream bit rate for each of the second favorable modes of operation to derive the performance index. 11. A modem unit for transmitting data via a communications network, comprising: a transmission unit configured: (i) to determine a set of possible modes of operation,(ii) to derive a first set of favorable modes of operation from among the set of possible modes of operation using a first level of priority-based selection based on priorities assigned to a first criteria, and(iii) to derive a second set of favorable modes of operation from among the first set of favorable modes of operation using a second level of priority-based selection based on priorities assigned to a second criteria; anda probing facility configured to perform a probing-based selection that comprises evaluating respective performances of the second favorable modes of operation to determine a resultant mode of operation when two or more second favorable modes of operation exist. 12. The modem unit of claim 11, wherein the transmission unit is further configured to perform a handshake procedure to determine the set of possible modes of operation. 13. The modern unit of claim 11, wherein the first criteria and the second criteria are annexes and protocol standards, respectively, that are supported by at least the modem unit. 14. The modem unit of claim 13, wherein the transmission unit is further configured to derive the first set of favorable modes of operation using the first level of priority-based selection based on priorities assigned to the annexes. 15. The modem unit of claim 13, wherein the transmission unit is further configured to derive the second set of favorable modes of operation using the second level of priority-based selection based on priorities assigned to the protocol standards. 16. The modem unit of claim 11, wherein the probing facility is further configured to select a second favorable mode of operation with a best performance from among the second set of favorable modes as the resultant mode of operation. 17. The modem unit of claim 16, wherein the probing facility is further configured to determine line conditions for each of the second favorable modes of operation. 18. The modem unit of claim 17, wherein the probing facility is further configured to derive a performance index for each of the second favorable modes of operation from the line conditions, and to select a second favorable mode of operation with a highest best performance index from among the second set of favorable modes as the resultant mode of operation. 19. The modem unit of claim 18, wherein the probing facility is further configured to determine a signal-to-noise ratio for each of the second favorable modes of operation to derive the performance index. 20. The modem unit of claim 18, wherein the probing facility is further configured to determine an upstream bit rate and a downstream bit rate for each of the second favorable modes of operation to derive the performance index.
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