Telecom ABC - G
The Gateway Mobile Switching Centre (GMSC) is a special kind of MSC that is used to route calls outside the mobile network. Whenever a call for a mobile subscriber comes from outside the mobile network, or the subscriber wants to make a call to somebody outside the mobile network the call is routed through the GMSC.
In practice, the GMSC is just a function that can be part of a MSC.
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