with no data take less time to complete a cycle the dsp transmitting these polls and receiving these responses will use less overall processing power for these modes the dsp will spend most of the time and therefore most of its processing power servicing poll response cycles that contain user data indeed the more user data in a cycle the more dsp processing power consumed over time it is this property that allows a low processing power dsp to effectively provide full user throughput to multiple local loops even though it does not have the processing power to simultaneously support all the local loops referring to fig7 illustrated is a flow chart of the process for the initializing the operation of polling routines residing in the dsp logic 26 fig 5 rom 92 memory program area 100 or ram 93 memory program area 93a first the polling selection routine is initialized within the dsp logic 26 fig 5 in step 121 next a general initialization of the transmit and receive operation routines is performed in step 122 initialization of the modem apparatus further continues by initializing the requested type of user polling routine in step 123 if round robin polling is requested the dsp sharing with round robin polling routine is performed at step 125 the dsp sharing with round robin polling routine will.