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Измерение и расчёт нагрузки

 

cuneyt97 (TechnicalUser) May 20, 2003

Hi all, After input of command TRREP ,

TRREP:MENO=0,DATE=2003-05-17&&2003-05-19,PERIOD=2;

 

i get the print out,  like the one below.. Does anybody tell the traff parameter. What does it mean? my aim is ,  to get the trunk utilization values, such as "Used trunks are  %50 of all trunks ..." etc. Is it possible?

 

TIME

TRAFF

OUTG.CALLS

INC.CALLS

NDV

NBLO

OFLO

CONG

08:00-08:15

1.54

1

0

90

27

0

0

08:15-08:30

2.04

1

0

90

27

0

0

08:30-08:45

2.13

1

0

90

27

0

0

08:45-09:00

1.34

3

0

90

27

0

0

09:00-09:15

1.43

9

0

90

27

0

0

09:15-09:30

1.30

9

0

90

27

0

0

09:30-09:45

1.60

10

0

90

27

0

0

09:45-10:00

2.22

11

0

90

27

0

0

10:00-10:15

2.04

8

0

90

27

0

0

 

duvel (IS/IT--Manageme) May 20, 2003

Traff parameter means the traffic intensity in Erlang.

 

cuneyt97 (TechnicalUser) May 20, 2003

Yes i see, but what does this mean? For exp., between 9-00 and 9-15 tha traff value is 1.43 between 9-15 and 9-30 it's 1.30 although the # of outg. calls are equal at these period. Do you know the formula of it? Which erlang is it? B, C?

 

Can i get the value of  max busy trunk on the route at that period? Thanks for the responses...

 

duvel (IS/IT--Manageme) May 20, 2003

If you want to find out which trunks carry most traffic , try initiating the traffic measurement for the particular trunks instead of the whole route ?

 

Sorry about Erlang , don't know to much about it myself either . Will try find out some more. Until then , Anyone out there knowing some formulas ?

 

jerommeke (TechnicalUser) May 20, 2003

1 Erlang means that over all the selected lines, you've used one the whole time.

 

For example when the measurement window is 15 minutes,

 

   1 Erlang equals 1 call during 15 minutes

or 1 Erlang equals 15 calls during 1 minute

or 1 Erlang equals 5 calls during 3 minutes

 

in the posted trrep :

 

09:45-10:00

2.22

11

0

90

27

0

0

 

11 calls have consumed 2.22 * 15  = 33.3 minutes of 1 line. or the average calltime = 33.3 / 11 = ~3 minutes

 

cuneyt97 (TechnicalUser) May 20, 2003

thanks for the explanation... Is there a way to learn  how many trunks of a specific route are used at a period (Average or maximum...)

 

to Duvel: We have 10 sites and approximately 40 or 50 routes to be monitored and reported in Excel. Is there any tool that you know for monitoring the trunk usage?Or how is it possible to monitor some trunks of the routes?Think that i've an ISDN port and want to learn how many calls are handled by the first 10 trunk of the route..

 

How will it help me as a conclusion?  THX.

 

duvel (IS/IT--Manageme) May 20, 2003

The tool using excel analyzing traffic data from MD110 is PPM (a part of DNA). It is an excel macro. But first initate traffic measurment for particular trunks with TRTLI:.....

This can more easily be done with PDM (another DNA application)

 

Duvel

 

jerommeke (TechnicalUser) May 21, 2003

The Erlang value is always the average within a given the timewindow. The busiest hour is used to calculate the needed trunk capacity with acertain amount of blocking.

Much more background available on the net, search for "+Erlang +calculate" using a search engine.

 

When using more trunks for one destination, the values of OFLO and CONG are also very usable. Both  indicate a number of Calls/Attempts

 

OFLO Calls are kind of good news, trunk is full but alternative trunk is used.

 

CONG is bad news , trunk is full and no alternative trunk is available.

 

BLO are the blocked trunk individuals.

 

Values OFLOW and CONG are not set for incomming calls, because the send systems determines which channel is used to send a call to the PABX. Reporting must be provided bij the sending system (Telco).

 

kind regards.

 

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