INTERNATIONAL  TELECOMMUNICATION  UNION

		     ITU-T RECOMMENDATION SUMMARY

Rec. No. : E.500

Title :	Traffic intensity measurement principles

Study Group : II - Network Operation

Version : Revised

Date of adoption : 1992

Notes :	


Traffic measurements provide the data base from which the planning, 
operation, management and, in some cases, accounting for transit 
considerations of the telephone network are carried out. Different 
applications may exist for the same traffic measurement.

Recommendation E.500 gives the principles for measuring carried 
traffic and bids on circuit groups and exchanges.

Circuit group dimensioning is based on a congestion objective, on the 
traffic intensity values at high traffic load time and on the forecast 
value of the intensity until the next augmentation of circuits. 
Intensity is measured during a daily busy hour and averaged over a 
number of days, to avoid exceptional values.

If the grade of service depends strongly on other factors than mean 
intensity during busy hour (as in e.g. a multislot network), then a 
new traffic reference period should be defined. This is for further 
study.

If traffic measurements are taken every day of the year (yearly 
continuous measurements), the required averages can be calculated 
directly. If traffic measurements are taken only during a limited 
number of days in the year (yearly non-continuous measurements), the 
equivalent traffic loads may be estimated. Recommendation E.500 
describes the corresponding procedures.



To order the complete text of this Recommendation, please use the 
Order Form for ITU-T Recommendations. An electronic version of this 
form is available on ITUDOC (Winword: UPI=ITU-5265; ASCII: UPI=ITU-2488).