With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cpwCTDMPerfIntervalMissingPkts
Cisco Pseudo Wire CTDM Performance Interval Missing Packets
1.3.6.1.4.1.9.10.131.1.6.1.4
Number of missing packets (as detected via control word sequence number gaps).
Back to CISCO-IETF-PW-TDM-MIB MIB page.
IPHost Network monitor allows you to monitor cpwCTDMPerfIntervalMissingPkts on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.