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ExtErlBTraffic()

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This function estimates how much traffic a trunk group of known lines can be offered if a given blocking figure can be tolerated.

 

 

Format

 

=ExtErlBTraffic (Blocking,Lines,Recall)

 

 

Result

 

A positive integer or zero.

 

 

Arguments

 

Name

Description

Units

Limits

Blocking

The ratio of calls offered to a trunk group that can be blocked

(Unitless)

Between 0.001 and 0.500

Lines

The number of lines in a trunk group

(Unitless)

Between 0 and 90,000

Recall

The percentage of calls that are immediately retried if blocking is encountered

(Unitless)

Between 0 and 95

 

 

Example

 

To estimate how much traffic a trunk group of 200 lines can carry at 0.030 (3%) blocking, assuming that 70% of blocked calls are immediately retried, enter

 

=ExtErlBTraffic(0.030,200,70)

 

The answer should be 186.877