This package defines H.248 methods to allow the following functions for the Siand Sa4-Sa8bits of the 2048 kbit/s basic frame structure defined in ITU-T Rec. G.704: The MGC instructs the MG to monitor and report changes in received spare bit states. The MG reports changes in received spare bits to the MGC. The MGC instructs the MG to changethe state of spare bits being sent.