Broadband access control, system for protection bearers

摘要

The invention discloses a broadband access control system having two ends with a receive and transmit switch at both ends. Main bearers and protection bearers extend between the ends. The switches operate to transmit customer data over the main bearers or over the protection bearers in the presence of a fault condition and to transmit itinerant data over the protection bearers only when the main bearers are available. A PILOT signal may be generated by the receive switches and applied to the main bearers in place of customer data and at a rate up to the rate of the customer data.