The switch 7 a thus routes the IP switched/line switched channels to the line 8 controlled by same so that they are more cost effective or more real time depending on the wishes of {HEAD ~ the user} or provider of {TAIL ~ the channels} 
The switch 7 a thus routes the IP switched / line switched channels to the line 8 controlled by same so that they are more cost effective or more real time depending on the wishes of { HEAD ~ the user } or provider of { TAIL ~ the channels }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL