 This topic has 180 replies, 1 voice, and was last updated 14 years, 5 months ago by kishor.

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taranaGuest
u can’t convert erlangs to minutes…
AXE dennis, i’m not sure what’s yr problem ?
u have route citic2c with traffic 3.8 erlangs, forgot what nbids mean (number of ???), congestion=0,
number of devices in yr route=95, blocked devices=0,average time duration of call=224.4secons, number of b subscribers answering calls =11 (not sure about this, but think this is right interpretation)..ScotGuestHi Tarana,
What is the use CCONG Field ?
How we can use it to determine further EXPANSION ?
Rgds
Scot
DennisGuestHi Scot,
CCONG means no. of congestion in percentage (%) max. is 100%
regards,
Dennis
ZarinaGuestAnboo,
30 calls in one hour with holding time of 5 minutes i.e. 30 people are making call and each are talking for 5 minutes which is absolutely possible. 30 calls in 1 hour does not mean that they can talk only for 60/30 minutes. So the example is absolutely perfect.
ScotGuestHi Dennis,
Lets say one of our TRaffic Route is Alwys Reporting 50 % Congestion.
It has 30 Circuits.And one of the aother route which has 120 Circuits reports 35 % Congestion.
I have the offer to go for expansion.How we can determine calculate no of ciruits to add with the existing capacity ?
Rgds
Scot
RagavendraGuestI want to know about dimensioning of voip network for class 5 services.Is erlang calculation for voip is different from TDM?. Can I use general B table for circuit capacity for voip?
DarrenGuestHi,
will the probability of calls being delayed > 0 sec for a trunked radio system be higher or lower compared to erlang c? Is there a difference between GoS and probabilty of delay?AnbooGuestZarina,
Thanks, I relaized it!.
abdulhamid diabGuestTraffic stuies show that a pbx has 600 Erlangs of usage on its incoming trunks per day.
Calculate the number of trunks required to support this traffic for each of the following grades of service:
a) PO.1
b) PO.01
c) PO.03MikeGuestI’m a newbie here so excuse me if this is obvious. I’ve been asked to calculate Erlang from peg counts and am not familiar with peg counts. Can someone explain and can I just substitute peg counts for lines in the Erlang calculations?
JasonGuestMike,
A “peg count” is simply a count of the number of calls that have taken place during the period of time being measured. It is an old term going back to the days of cord boards, and was a term used way back when A.K himself came up with his famous formulas for traffic calculation. You can’t interchange it with the number of lines in traffic calculations.
If you want a good description of traffic theory for nonmath people, check out “Telecommunications Mangagement” by James Harry Green. He does a good job of laying it out. He even includes the formulas for the various traffic calculations everyone keeps asking for here. Though if you aren’t into stats, they won’t do you much good.
NeranjanGuestI would like to know exact calculation for conversion of Erlang values to Call minutes.
ErikGuest1 erlang = 1 hour of traffic = 60 minutes of call.
As for me, i would be very interested if someone knows a nonrecursive formula for calculating capacity from blocking probability and number of circuits. By “nonrecursive”, i mean that there would be no “sum”. Only some plain formulas like logarithms or whatever. It is not easy to implement loops in database queries.
Or if it is known that it is impossible to get such a formula, thank you also to let me know.
ScotGuestHi Guys,
I have a very critical issue…
My Switch is calculating Trffaic for 24 Hrs as :
Traffic =
Number of Bids * Holding Time
_____________________________60 * 60 * 24
Why ?
Rgds
Scot
ScotGuestSorry I dint Explained much.
The traffic calculation is based on Number of Bids & Holding Time.Why this setup ?
What is the difference between Actual Holding Time & Act. Call Time ?
Rgds
Sunil

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