 This topic has 124 replies, 1 voice, and was last updated 1 year, 6 months ago by Althaf.

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Jose QuinteroGuest
Asaaf,
Let me know your address to send it you a File
Regards
Assaf PeledGuestit’s peled_assaf@hotmail.com
or asaf@ttitelecom.com
thanks a lotNouman MahmoodGuestGrade of Service (or GOS) is the probability of a subscriber finding
Congestion. Congestion means that all circuits are busy and no
Switch path is available. Thus, a higher GOS means poor Service.A GOS 0.01 means 1 out of every 100 call is lost(or rejected) due
to congestion on circuits.Lets assume:
X = (( Traffic in Erlangs)^ n) / n!
SIGMA Y = (( Traffic in Erlangs)^ k) / k! ; k = 0 to k=n
GOS = X / SIGMA Y
Where n = Total no. of Circuits (or channels) avaible.
Adriana InfanteGuestHello,
I work in ETB ( Empresa de Telecomunicaciones de Bogota), The biggest telecomunication company of my country, and I want to ask you, about How can I, get QOS over different tecnolo., for example, we have about 2.700.000 lines , some of those are EWSD ( Siemenes ) or AXE (Ericcson) or FETEX (Fujitsu),
Thank you for your answer!
PD. If someone can send me an excel of gos matrix to luz_infl@etb.com.co
HAve a Nice day!
AIL
Jose QuinteroGuestAdriana,
The GOS does not depend of Technology or Manufacture. It come from other variables.
The Number of Trunks that you available, The traffic in erlang that you expect to have.
With those value you will have de GOS..
Regards
Jose Quintero
DeepaGuestI need an erlang B and erlang c table? i need to bring them for my test next week..
would anyone please tell me where i could get a copy of thoseAdriana InfanteGuestWhat do you think? about :
GOS = Fails + congest
—————— * 100
CallsNaveen KumarGuestWhat is the relation between GOS ,BHCA and traffic (in Erlangs)?
How can we calculate the traffic on E1 if we know the BHCA of our system?
What will happen if on a system with BHCA rating of 1 million ,5 million subscribers are calling at a time?
Zubair A.KhurshidGuestI am evaluating WLL netwrok on CDMA2000One. I am looking for evaluating number of digital trunks (E1s)required by calculating erlangs and determining GoS. Can anybody send me GoS matrix in excel at zubair@dancom.com.pk
Mehmet BeyazGuestHi Joan,
GoS is basically the probability (P)of callers will be blocked (congestion). P=GoS usually % 2 for cells and GoS= %0.1.
For some callers not able to establish a call or get a service at the first attempt.
Regards
Mehmet Beyaz
Do not hesitated to contact me if you have further questions
mehmet.beyaz@ttgint.comZubair A.KhurshidGuestHi Mehmet
Can you knidly send me the GoS matrix excel sheet on my email address
Jose QuinteroGuestAfriana,
Yeas you are right, The gos 1% for example,
Means: for each 100 call one call will be droped.
REgards
JIQ
Zubair A.KhurshidGuestDear Jose,
Then what is the range of GoS that should be chosen in a network design?
Regards,
Zubairkristhudass rabertGuestDears….
I am Dip.in Electrical but i got job in telecom; WLL technology.
i want to know belows.
1.How to calculate Erlong? and i need formula ?
2. What BHCA in brief?
3.What is the diffrens between CDMA and TDMA?
4.How can we calculate p.xx ?
5.I need Erlong excel table for
B and CmakhijapGuesthi
I want to know grade of sevice ,can we change the parameter in Gos
thanks lot 
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