IMS Registration Failed || Test Case Root Cause Analysis

IMS Registration Failed || Test Case & Root Cause Analysis Hi All IMS (IP Multimedia Subsystem) registration failure can occur due to multiple reasons, impacting VoLTE, and other IMS-based services. Common causes include: 🔹 Network Issues – Poor LTE coverage, incorrect APN settings, or firewall restrictions. 🔹 SIP Signaling Failures – Errors in SIP REGISTER messages, missing headers, or 403/503 responses. 🔹 Diameter Authentication Issues – Errors in HSS-MME communication, misconfigured AVPs (like AVP 607 & 612). So Lets Discuss About a such case Where Subscriber Authentication Scheme is wrongly Configured in HSS , Thats Why SCSCF Reject registration with 403 Forbidden #ims #volte #testcase #rootcauses #wireshark #pcap #lte #4g #5g #education #troubleshooting #scscf #solexnetworksolutions #ims #interview #erricson #nokia #sip #protocol #registration #callflow #whathappens #telecom #telecommunication #jobs #ipl2025 #sipp #diameter #protocol #pcrf #charging