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Reply To: Number of lines?

Alex Yuen

Number of lines required

The number of lines required is under a predefined grade of service e.g. 0.5% of GOS or 0.1% of GOS at peak busy hour ( normally will be the typical type of services, different services will have different peak busy hour)

e.g. local telephone lines
at 0.5% of GOS at peak busy hour,
erlang B is using with full availability, 10 lines only offers to carry 3.96 erlang.