{HEAD ~ Adjusting means} are provided for adjusting the utilization of {TAIL ~ the second channel} by the second service at least during the connected operation of the first and the second service 
{ HEAD ~ Adjusting means } are provided for adjusting the utilization of { TAIL ~ the second channel } by the second service at least during the connected operation of the first and the second service
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH