blog address: https://www.vindaloosofttech.com/blog/differences-class-4-class-5-softswitch/

keywords: Class 4 Softswitch, Softswitch, Softswitch Solutions, VoIP Billing Solutions, VoIP development services, VoIP service providers, VoIP solutions, Class 5 Softswitch, class 4 and 5 Softswitch, VoIP solution providers, Telecommunications, VSPL

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