With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
fcIfC2PBSYFrames
Cisco Fibre Element If C2 PBSY Frames
1.3.6.1.4.1.9.9.289.1.2.2.1.8
The number of times that port busy was returned to this port as result of a class 2 frame that could not be delivered to the other end of the link. This occurs if the destination Nx_Port is temporarily busy. PBSY can only occur on SOFc1 frames ( the frames that establish a connection ).
Back to CISCO-FC-FE-MIB MIB page.
IPHost Network monitor allows you to monitor fcIfC2PBSYFrames on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.