Specifications
50003510
Revision A
219
To aid in configuring your system, the following chart can help you in determining the number
of trunks required. For this chart to be effective certain assumptions have been made. If your
system does not fit with these assumptions, then consult your dealer or sales representative.
Assumptions:
(a) Traffic patterns are approximately
•
33% internal
•
33% outgoing
•
33% incoming.
(b) Trunks are both-way, as these are most efficient for carrying traffic.
(c) An adequate number of receivers are present. Rule of thumb is 4 receivers per 60
telephones.
(d) Target grade of service is P.01 or the same as the level which most telephone companies
provide.
To use the chart you must determine your average traffic levels for the busiest hour of the day.
Divide the number of calls for this hour by the number of telephones on your system.
•
1 call per hour = light traffic
•
2 calls per hour = medium traffic
•
3 or more calls = heavy traffic
On the bottom axis of the chart select the number of telephones in your installation. Choose
the line on the graph that represents your traffic level. The left axis indicates the recommended
number of trunks.
Special applications (such as ACD) should be highlighted to your dealer or sales representative.
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