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Where is the SCCP on SS7 layers?

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Naveed Alam

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I have seen many documents about SS7, some show that SCCP is on layer 3 and some shows its on layer 4 of OSI.
Which one is true and what is its authenticity??
Furthermore, can someone upload some good stuff related to SS7 (especially for mobile)??


Naveed
 

Re: SS7 Layers

Here is a good book about SS7 :



It's considered the bible of the SS7 ..

Have fun :)
 
Re: SS7 Layers

Can any one answer the questions also ..?
 

Re: SS7 Layers

sccp is layer 4 protocol. u refer ss7 simple document from net
 

SS7 Layers

Basically, the first 3 layers of SS7 should be MTP1, MTP2 and MTP3. So, SCCP should be 4th layer.
 

SS7 Layers

There are often confusing - if i am not wrong ITU defines LEVELs and ISO LAYERs so sccp corresponds to level 4 in ITU and layer 3 in OSI model.

Added after 4 minutes:

look here :
**broken link removed**
 

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