With IPHost Network Monitor you can run simple snmp requests against a Avaya device in your network.
promPortDuplexMode
prom Port Duplex Mode
1.3.6.1.4.1.2167.3.6.3.1.1.31
A point-to-point Ethernet port may be configured to support half or full duplex communications. A full-duplex(2) port transmits and receives data concurrently, effectively doubling the data rate of the port. Half-duplex(1) ports transmit or receive data, but not at the same time. Half-duplex ports use CSMA/CD as the access method to the network. Ports that are connected to shared segments (i.e. connected to a repeater), should always be configured to be in half-duplex mode. This object indicates the desired duplexity of this port. If auto-negotiation is turned on for this port, then this value is ignored.
Back to LUCENT-CAJUN-SWITCH-MIB MIB page.
IPHost Network monitor allows you to monitor promPortDuplexMode on Avaya device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Avaya IP phones right now.