Patent ID: 7577222

Claim:
An apparatus, comprising: a base modem clock counter responsive to a base modem clock signal to generate base modem clock period data, wherein the base modem clock period data includes a first modem clock period reading of the base modem clock counter taken at a first frame pulse and a second modem clock period reading of the base modem clock counter taken at a second frame pulse; a base frame clock counter, coupled to the base modem clock counter, responsive to a base frame clock signal to generate base frame clock period data, wherein the base frame clock period data includes a first frame clock period reading of the base frame clock counter taken at the first frame pulse and a second frame clock period reading of the base frame clock counter taken at the second frame pulse; and a base logic module coupled to the base frame clock counter and the base modem clock counter, to determine a first difference between the first and second base modem clock period readings and a second difference between the first and second base frame clock period readings, and to generate a protocol data unit (PDU) which is transmitted to a subscriber unit to facilitate clock synchronization, wherein the PDU includes the first difference and the second difference.