SIP is signaling
INVITE/response/BYE exchanges establish and tear down calls. Registration failures, authentication challenges, and route errors usually appear here.
TechFinity toolkit
VoIP PCAP / SIP Analyzer
Fast SIP, SDP, RTP, and RTCP analysis using tshark to discard unrelated traffic before Python builds call and media statistics.
Optimized dissector pipeline
Analyze a capture
Max 150 MB. Uploads are staged privately, analyzed, and deleted immediately after parsing. Optional exports expire automatically.
SDP describes media
SDP advertises media IPs, UDP ports, payload types, codecs, and security attributes. Compare these with the RTP that actually appears.
RTP quality
Sequence gaps suggest loss; interarrival variation suggests jitter. Capture location, SPAN drops, and asymmetric routing can also affect measurements.