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