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Dookie
Joined: 10 Jul 2007
Posts: 8
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 Posted: Tue Jul 10, 2007 2:53 pm Post subject: SS7 routing |
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Hi All,
I wondered how the lower layesr of SS7 are working. How is an SMS routed over SS7 between mobile operators? I can't found any useful document about how this is done.
Moreover, How the MSU's of the SMS look like in the SIF field of the MTP3?
Finally, Can the SMS traffic be forced to be routed to a specific point code without the care of the GTT?
Thanx for you answers |
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KevinMasters
Joined: 09 Jul 2007
Posts: 4
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| Posted: Tue Jul 10, 2007 2:55 pm Post subject: |
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It's an OSI standard model
MTP1 is the physical layer, as in the wire or fiber between the network entities or nodes.
MTP2 is communication integrity, checksums and the like (FIB, BIB, etc.)
MTP3 is where the Telephone junk starts. Point codes (OPC, DPC), redundancy routes (route costing), congestion controls (priority bits), that sort of thing.
SCCP is the application layer that identifies the message flow (RI, NPI, NAI, GT Addresses ). This is the upper level, where the SMS magic happens. |
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hutsefluts
Joined: 10 Jul 2007
Posts: 11
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| Posted: Tue Jul 10, 2007 2:57 pm Post subject: Re: SS7 routing |
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[quote="Dookie"]
Finally, Can the SMS traffic be forced to be routed to a specific point code without the care of the GTT?
[/quote]
no, it cant |
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