Traffic Service Position System No. 1B: Long-Range Planning Tools

The planning of Traffic Service Position System (TSPS) installations and growth is rather different from that usually encountered in engineering central office equipment.1 One of the reasons for this is the great flexibility that the engineer has in selecting the placement of operator position subsystems and how traffic will be routed to the various TSPSs that serve a particular area. The availability of the TSPS No. IB offers new choices: formerly, when a TSPS exhausted its call processing capacity the alternatives were to divert the traffic overload to another TSPS that had surplus capacity or to purchase a new TSPS and divert load to it. Under the new system a TSPS No. 1 can be retrofitted to a TSPS No. IB with much greater call capacity.2 The resulting efficiencies, including avoidance of trunk rearrangements, trunk splintering, and opening of new operator groups, provide significant economic benefits to the operating telephone company. The TSPS No. IB also provides the engineer more opportunities to consolidate, that is, to retrofit a subset of a group of TSPS No. l's to TSPS No. lB's and retire some or all of the remaining TSPS No. l's in the group. 959