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WITHIN THE CELLULAR SYSTEM, NUMEROUS CONVERSATIONS CAN TAKE PLACE AT ANY ONE <br />TIME. ALMOST WITHOUT EXCEPTION, CELLULAR USERS DO NOT HAVE TO WAIT TOtPLACE A <br />CALL AS DO USERS WITH FREQUENCY CHANNELS, SUCH AS CONVENTIONAL MOBILE TELEPHONES <br />AND RADIOS. IT IS EVEN POSSIBLE FOR SEVERAL CONVERSATIONS TO TAKE PLACE ON THE <br />SAME CHANNEL WHEN THE CALLS ORIGINATE FROM DIFFERENT, NON - ADJACENT CELLS. <br />EACH INDIVIDUAL CELL IS CONNECTED TO A CENTRAL MOBILE TELEPHONE SWITCHING OFFICE <br />( "MTSO "). <br />Fig. 2.3 Coils connected to MTSO. <br />THIS LOCATION CONTAINS THE CENTRAL COMPUTER SWITCH FOR THE ENTIRE LOCAL CELLULAR <br />SYSTEM.. THE MTSO IS CONNECTED TO A CENTRAL LAND TELEPHONE SWITCHING OFFICE. <br />THIS ENABLES THE CELLULAR USER TO PLACE A TELEPHONE CALL TO ANY PLACE IN THE <br />WORLD WITHOUT THE NECESSITY OF UTILIZING THE SERVICES OF AN OPERATOR. <br />MTSO <br />co <br />Fig. 2.4 Tho connection of cell eltes to tho homo phono. <br />-2- <br />cw <br />M <br />46 <br />