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A Class 4 Softswitch simply refers to a softswitch that routes calls using VoIP rather than traditional PTSN calls. A VoIPswitch can also route calls that originate from within its VoIP network to endpoints (phones and their associated numbers) in traditional PSTN networks. In other words, Class 4 softswitches route traffic between various Class 5 areas. One way to think about it is this: a Class 5 softswitch is a retail solution while a Class 4 softswitch is a wholesale solution.
Key Feautres for Class 4 Softswitch:
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