Tshark is part of the wireshark application for VoIP

Tshark we use for dump and analyze network traffic.
Install Wireshark in CentOS.

yum install wireshark

SIP Message type Statistics

tshark -qz sip,stats

RTP call quality info

tshark -qz rtp,stream

MAN pages and help links
http://www-scf.usc.edu/~csci530l/downloads/tshark.man.txt
https://www.wireshark.org/docs/man-pages/tshark.html