A cellular telephone network comprises peripheral branches and a central high-capacity data trunking region or network backbone. The invention concerns effective utilization of trunking capacity to provide backbone facilities for such a network. The network backbone comprises a satellite interface for a satellite connection and alternatively or additionally a backup backbone route. For example an Internet backbone route and a satellite backbone route may be used, one backing up the other.

 
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> Resource reservation protocol based guaranteed quality of service internet protocol connections over a switched network

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