| 摘要 |
<p>A method of mapping data frames from a LAN into a synchronous digital telecommunications system (89) for ransmission to a number of different remote destinations (101, 102, 103), where data frames (71) with a VLAN identifier (73) are used, comprises the steps of assigning VLAN identifiers (73) to the destinations so that each VLAN identifier is assigned to only one destination; storing in a table (121) for a number of VLAN identifiers corresponding destinations; detecting from a data frame (71) to be mapped the VLAN identifier (73); reading in said table (121) the destination (101; 102; 103) corresponding to the detected VLAN identifier; and mapping the frame (71) into the telecommunications system (89) in a channel (97; 98; 99) connected to the destination (101; 102; 103) read from the table (121). Frames can then be sent on one single cable from the LAN switch to the entry point of the telecommunications system independent of their destination. <IMAGE></p> |
