I have a client experiencing voice quality issues and their voice vendor is asking us to perform some Wireshark packet captures. They have a Netgear GS724TPv2 PoE switch, which supports port mirroring, so according to NEC's instructions I mirrored the ports the PBX and IP phone are connected to and made the port my laptop is connected to the probe port. I run the captures, making test phone calls from the IP phone, but NEC is saying the captures aren't showing any SIP traffic to/from the PBX and the IP phone.
I don't run packet captures very often so I'm hoping an expert out there can confirm if the configuration I am running the captures in is correct? Thanks in advance!