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Operator interconnections

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Wed, 05/10/2006 - 13:46
#1
Ryanm
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Joined: 03/11/2006
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Operator interconnections

Hi..
I have some questions about operator interconnections in terms of roaming.
How the roaming established between two networks? And why some times subscriber of one network A can roam only in certain networks
where as B can roam in other networks that A can not roam in, and sometime vice versa...

Please let me know if the question is not clear.
TIA.

Edited by admin on 05/16/2010 - 04:32

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Tue, 05/16/2006 - 04:53
#2
Parasa
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Re: Operator interconnections

Hi Ryan,

When network isbeing layed the operator takes a roaming agreement with the network operator worldwide. It can happen that in some cases the operators have not agreed upon the roaming facility. In such cases the network will not authorize any query coming from the unauthorized network.

Even the SendRoutingInfo fails for the network for which there is no roaming agreement.

Regards,

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Tue, 05/16/2006 - 11:26
#3
Ryanm
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Re: Operator interconnections

Thanks TeleRay!
So, this roaming agreement facilitates some kind of signalling route betweenboth of the operators?

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Tue, 05/16/2006 - 11:35
#4
Parasa
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Re: Operator interconnections

Ryan,

As far as I know there won't be any dedicated signalling route between the operators, but the operator on both ends will enable each others network only if roaming agreement is signed.

In some cases the check is done on the complete number (calling party) and in some cases it is done on the basis of a part of calling party (prefix).

Regards,

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Thu, 06/22/2006 - 19:49
#5
RussCrush
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Re: Operator interconnections

Roaming agreements include the exchange of the IR.21 document between the Operators, which provides information about the Operator that is needed to support roaming. This information includes (but is not limited to) line ranges (E.164), E.212 and E.214 addresses, and supported services (CAMEL, GPRS, etc...). The traffic for roamers are sent to SCCP Service providers, and routes on Global Titile. The SCCP Service Providers exchange the IR.21s and build GT tables to route the traffic between the roaming Operators. Once completed, testing and roaming can begin. Sounds complicated, and it is. But that is how it happens.

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Mon, 08/17/2009 - 09:44
#6
brosregister
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Joined: 08/17/2009
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Re: Operator interconnections

Allow me to shed some more light on this particular matter as it is within my domain.
RussCrush is right. The roaming agreement also include the exchange of AA14 which state tariff (charging) of calls such as sending sms, receiving call while roaming, making call and using data (gprs/internet on mobile).

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