A preferred embodiment of the present invention is disclosed to include a router system having a trunk feature card and at least one modem feature card for transferring communication information between the modem feature cards through a TDM backplane, to the trunk card, for transfer thereof to Digital...http://www.google.es/patents/US6366587?utm_source=gb-gplus-sharePatente US6366587 - TDM backplane stream resource distribution system
