What is the SPS?
the SPS is Signaling Service Processing System and provides the DRA, SSR, and STP functions defined by 3GPP. The DRA, SSR, and STP implement the intra-network message aggregation, inter-network border gateway, and customized signaling forwarding functions, but they are deployed in different networks. The DRA aggregates and forwards Diameter signaling messages, the SSR aggregates and forwards SIP signaling messages, and the STP aggregates and forwards SS7 signaling messages
What is the SSR ?
The SSR is : SIP Signaling Router
What is the DRA?
The DRA is : Diameter router agent
What is the STP?
The STP is : Signalling Transfer Point
What is the SIP?
The SIP is : Session intiation Protocol .
There are two Video explain the SSR / DRA with SPS herein
