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Traffic Measurement and calculation

zabin - 6th June 2017  (10:47 GMT)

how to calculate CER ? Please help me with the equation

Imran - 23rd September 2005  (14:52 GMT)

I want to know different strategies that need to bbe adopted to improve ASR in EWSD exchabges.
I am working at OMC and EWSD transits are connected to different exchanges like E10-B ,Huawei ,ZTE ,Ericson
I want to know how can I improve ASR in different direction.What should I look at .

Riyadh - 1st November 2004  (09:35 GMT)

can i use the following formula to calculate ASR ?

ASR = Successful Calls / No. of bids. *100

And, what are the possible reasons for lower or drop in ASR.

And, what are the factors that can affect the ASR?

Mahalingam - 6th January 2003  (06:37 GMT)

Dear Naveed,

The ITU earlier known as (CCITT) documents are available here. The E600 is at

If u are working with AX-10 Ericsson switch, the command and the counter which are used for calculating these parameters will be of much help

Naveed Shaikh - 4th January 2003  (09:43 GMT)

Dear Mahalingam
1. the formula for calculating Call Completion Ratio is
CCR= (CCS with answer(Out) + CCS Subs Busy+
CCS Unanswered)/ Out going Call Seizure

2.ASR(O.G)= CCS with Answer/Out
going Call Seizure

ASR(I.C)=CCS with Answer/Calls Carreied I.C

i DONT KNOW THAT THESE FORMULAS ARE according to ITU documents or not but these formulas are being applied by the Big Telecom operator in pakistan for EWSD and Ax-10(ericsson) switches.

I would like to know about ABR.
I will be thankful if you can send me The ITU recomendation docs

Naveed Shaikh
MUET jamshoro

Mahalingam - 3rd January 2003  (08:38 GMT)

How do we calclulate the following
for 5ESS Local Switch from Lucent and AXE-10 from Ericsson with reference to the ITU document
ITU-T 600. What are the counters that should be taken to calculate offered by these switches.

ITU-T Recommendation E.600
2.13 Completion ratio
2.14 Answer Seizure Ration(ASR)
2.15 Answer bid ratio (ABR)

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Last modified: 17 May 2017

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