Fig. 8.7. Output channel utilization of LCC system.
In designing a telephone system, it is necessary to ensure that the system will operate satisfactorily under the moderate overload condition.
Example 8.6. Consider a trunk group with an offered load 4.5 erlangs and a blocking probability of 0.01. If the offered traffic increased to 13 erlangs, to keep same blocking probability, find the number of trunks needed. Also calculate the trunk occupancies.
From the Fig. 8.6 or from the Appendix B,
For the increase in load of 13 erlangs, from the figure 8.6 No. of trunks required = 21 for same B = 0.01 required Hence B(10, 4.5) = B(20, 13) = 0.01 The trunk occupancies calculated as
Was this article helpful?
You can now recondition your old batteries at home and bring them back to 100 percent of their working condition. This guide will enable you to revive All NiCd batteries regardless of brand and battery volt. It will give you the required information on how to re-energize and revive your NiCd batteries through the RVD process, charging method and charging guidelines.