With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cwrArqVoiceLatency
Cisco Wireless Arq Voice Latency
1.3.6.1.4.1.9.9.136.1.4.1.1.2
This object identifies the latency value for voice data.
Back to CISCO-WIRELESS-IF-MIB MIB page.
IPHost Network monitor allows you to monitor cwrArqVoiceLatency 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.