Initial Detection Point (telephony)
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Initial Detection Point (telephony)
The IDP receives a message (IDP Message) initiated by the SSP (service switching point) and transmitted to the service control point SCP via the INAP protocol. The Service Switching Point (SSP) receives a message ''(ISUP Message)'' initiated by the Calling Party, this could be an IAM (Initial Address Message). The SSP evaluates the nature of the message, in the case of the IAM the called and calling party numbers. From this it determines whether it can route the call or whether it needs further instructions. In this case if the SSP does require further instructions it sends an IDP to a service control point SCP SCP may refer to: Organizations Political parties * Soviet Communist Party, the leading political party in the former Soviet Union * Syrian Communist Party * Sudanese Communist Party * Scottish Christian Party Companies * Seattle Computer Produ ... via an IN protocol. The protocol may be INAP but could be CAMEL, or bespoke INAP flavours such as Ericsson INAP, Nokia INAP, S ...
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Service Switching Point
In telephony, a service switching point (SSP) is the telephone exchange that initially responds, when a telephone caller dials a number, by sending a query to a central database called a service control point (SCP) so that the call can be handled. The service switching point uses the Signalling System No. 7 (SS7) protocols which are responsible for the call setup, management, and termination with other service switching points. Relationship between SSP and SCP With the introduction of the Intelligent Network architecture, service functionality (e.g. UK translation of 0800 non-geographic telephone numbers) is being removed from the actual telephone exchange and devolved out into other computer nodes. In this new architecture, the telephone exchange is known as an SSP and the node that contains the services (and hence ''controls'' the progression of a call) is known as service control point (SCP). Example of a 0800 number translation service In the UK 08XXX numbers are non-geogr ...
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