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SS7
Work on SS7 began in mid 1970s
CCITT (ITU-T currently) as leading
force
“800 service” and “calling card service”
as first attempts to new concept
used layered approach to system
construction
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SS7 supports signalling for:
Public Switched Telephone Networks
ISDN
Public mobile networks
Operations, administrations and maintenance
as a basis for interactions with network data
bases and service control points for advanced
services
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SS7 network structure
Sie sygnalizacyjna SS7
Sie telefoniczna
- centrala telefoniczna
STP – Signalling Transfer Point
- SP – signalling point