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Call flow for international Roaming

Monalisa - 18th September 2010  (08:21 GMT)

What is the cause of outgoing call issue of ported in roaming prepaid Number

Jahangir Alam - 20th June 2010  (02:56 GMT)

Do any one have any idea regarding how one roamer get one roaming network coverage out of others? What about the selection criteria by default? Although we know some mobile give option but what happens if not get any option

dane - 18th June 2010  (08:38 GMT)


A.A Malik - 17th June 2010  (16:20 GMT)

Dear Isaac,

as a reply of your first question that how an outbound roamer will select correct VPLMN when there are many choices.

The answer is:

When subscriber is allowed for International Roaming, the GT (Global Title) of VPLMN MSC is added in subscriber's HLR of HPLMN in "IMSI->GT translation" section.

On very first LU (Location Update), the request is forwarded by VPLMN network to HPLMN'S HLR and only correct MSC is authenticated whose GT is present in HLR.
It will resolve your query hopefully!

Sineesh C - 30th May 2010  (13:59 GMT)

Sorry.The trailing information is regarding other subject.

Sineesh C - 30th May 2010  (13:56 GMT)

How we can calculate Erlangs ?

Suppose we have 35 channels.
Blocking probability is 0.02
As per theory(Erlangs B Calculation)

Erlangs is 26.4.

How it is possible?

My doubt :
We have 35 resources or Channels.If all resources are using continuously for one hour, it is 35 Erlangs. If we are considering blocking of .02,the available Capacity should more than 35 Erlangs. Is it?

Jahangir Alam - 30th May 2010  (03:51 GMT)

Do anyone have documents regarding international Roaming call flow and related message regarding Location update/Call to roaming country/call to home country/call to another locaion.

If so please share if you like.

selemon - 15th May 2010  (13:29 GMT)

HI all,
Is there anyway to conduct traces with the roaming partner?

MSU level

idoseo - 21st March 2010  (11:39 GMT)

Hello guys!

just registered to this board,and I just wanted to say hi everyone!


hi all, - 8th November 2009  (07:45 GMT)

is there any one who can help in CAP2 roaming:
is there any way to reconcile between TAP files and CCN(IN) to make sure that prepaid subscriber is not calling for free or less.
or any other useful techniques someone know to get rid of this type of fraud

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