COMMON CHANNEL SIGNALING WITH A NETWORK OF DISTRIBUTED SIGNAL TRANSFER POINTS

摘要

The common channel signaling (CCS) system of the public switchedtelecommunication network involves digital call routing information that iscommunicated between the switches of the network and signal transfer points(STPs)of the CCS system and among the STPs themselves. The CCS system causes thenetwork switches and the trunks that connect them to be so interconnected astocomplete a connection between a calling party and a called party. The STPs arekeptas close as practicable to the network switches so as to minimize the lengthof thedigital transmission links between them. This results in a proliferation ofless-than-optimally utilized STPs. Therefore, the constituent parts of a STPare geographicallydistributed over a wide geographical area with higher-capacity digital linksbetween theconstituent parts of the STP, in order to realize substantial transmissioncost savingsand to drastically reduce the number of individual STPs extant and thus reducethecomplexity of the CCS communication between them.