With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cwvlVoIPVlanId
cwvl Vo IP Vlan Id
1.3.6.1.4.1.9.9.268.1.1.4
This object is the VoIP VLAN ID. All VoIP VLAN ID values are non-zero VLAN ID. A value of '0' is used to represent CDP VVID.
Back to CISCO-WLAN-VLAN-MIB MIB page.
IPHost Network monitor allows you to monitor cwvlVoIPVlanId 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.