
© Time Warner Cable Business Class
Trunks vs. Lines
Call capacity in both cases is eight simultaneous calls
Difference
– With lines there are eight telephones with numbers
– With trunks the PBX can support many more than eight telephones
Based on calling patterns, eight trunks can support ~30 telephones
Cost for the trunk service is significantly less per telephone
(~25 percent)
TN1 TN3 TN2
TN5 TN4
TN6 TN7 TN8
8 Channels with
30 TNs
8 Lines with one TN per line
8
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