With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
voicePortIfConfigPortIndex
voice Port If Config Port Index
1.3.6.1.4.1.9.5.1.26.1.1.2
within a module. The value is determined by the location of the port on the module.
Back to CISCO-STACK-MIB MIB page.
IPHost Network monitor allows you to monitor voicePortIfConfigPortIndex on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.