In order to configure and monitor the operation of a span-powered T1
radio, use is made of the out-of-band facility data link channel that is
available within an extended superframe of the T1 digital data stream
transported between an indoor carrier services unit and the T1 framer of
the radio. The facility data link channel is employed to transport
packetized configuration and status information between the indoor
carrier service unit and the span-powered T1 radio.