Wireshark

Users report degraded voice quality, robotic audio, speech clipping, or audio drops during active VoIP calls. Packet captures reveal high RTP jitter (>30ms) and out-of-order packet delivery causing jitter buffer underruns and overruns on receiving endpoints.

Troubleshooting Secure SIP (SIPS) issues requires visibility into both the TLS handshake mechanics and the underlying SIP payload. This guide explains how to capture encrypted traffic on TCP port 5061 using command-line utilities and decrypt the payloads within Wireshark. You will learn the distinctions between static RSA decryption and Perfect Forward Secrecy (PFS), alongside practical steps to analyze handshake failures and decrypted SIP signaling.