With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cds3StatsTable
Cisco DS3 Stats Table
1.3.6.1.4.1.9.9.132.1.3.1
T3/E3 Statistics table. This table maintains the number of times the line encountered Loss of Signal(LOS), out of frame(LOF), Alarm Indication signals(AIS), Remote alarm indications(RAI), C-bit coding violations(CCV), Framing Errors(FE), from the time it is up. Line fails and goes down as a result of failures. When the line is brought back up again by the user the error statistics are cleared.
Back to CISCO-DS3-MIB MIB page.
IPHost Network monitor allows you to monitor cds3StatsTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.