| 摘要 |
The invention relates to a method for setting up s data link, wherein an end-to-end link comprises at least two separate legs with error correction protocols. The legs may have different physical layer connections or their error correction protocols (V.120, RLP) may be different. An interworking function IWF according to the invention that is located between these legs is integrated such that the legs can communicate with each other during set-up of traffic channel in order to exchange data compression parameters. The IWF intervenes in an end-to-end data compression negotiation, performs protocol conversions on messages transmitted from one leg to another, synchronizes the legs, if required, by delaying the set-up of the faster leg and the compression negotiation, modifies the compression parameters provided by the legs, if required, and if the end-to-end data compression negotiation fails, it may set up data compression on only one leg.
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