| 摘要 |
<p>The invention relates to a channel structure in a WLL system which combines independent access networks to the PSTN and the internet and whose subscriber stations are provided with a/b link and Ethernet interface for direct internet access and that can be used independently as well as simultaneously. The subsegmented IP and OA & M data and POTS signals are transmitted for every subscriber station via a common layer 2 link. The separated transmission of user data of the POTS links is carried out as a compressed voice transmission, facsimile transmission according to T.38 or transparent modem transmission with 64 kbps with automatic recognition and transfer. Transmission of both services is carried out in different traffic types to which different FEC can be allocated, whereby a plurality of adapted traffic types can be configured in a modular manner from a pool of different packet data units and is dynamically allocated. The inventive system is preferably used in systems where a wire-based telecommunication structure cannot be put into operation at short notice, or not all or only at high costs.</p> |
