VoIP Monitor FAQs
Will VoIP Monitor work with VoIP infrastructure?
Orion VoIP Monitor is VoIP vendor independent. The only requirement is to have an IP SLA capable Cisco router at each of your WAN or geographic locations.
What is MOS?
MOS (“Mean opinion score”) is calculated on the router by IP SLA using a Cisco-proprietary formula that takes into account the simulated codec, latency, jitter, packet loss, and a few VoIP Monitor settings. MOS represents a numerical rating of perceived quality of a VoIP call. MOS is in the range of 1-5, where 1 is the lowest perceived quality, and 5 is the highest. A MOS score below 3.5 is generally considered not acceptable. Generally, MOS reflects call quality as shown in the following table.
Call Quality
|
MOS
(ITU Scale) |
| Very Satisfied |
4.3 – 5.0 |
| Satisfied |
4.0 – 4.3 |
| Some Users Satisfied |
3.6 – 4.0 |
| Many Users Dissatisfied |
3.1 – 3.6 |
| Nearly All Users Dissatisfied |
2.6 – 3.1 |
| Not Recommended |
1.0 – 2.6 |
What is a codec?
A codec is a method of encoding and decoding voice into packets for transmission across IP networks. The codec you select on the VoIP Settings page affects the size and frequency of the test packets sent by IP SLA and the MOS calculation.
What versions of CallManager are supported?
VoIP Monitor collects SNMP data from CallManager and CallManager Express. As long as the CallManager supports the CISCO-CCM-MIB MIB, VoIP Monitor should be able to collect the desired data.
What is a VoIP site?
Each VoIP Site represents a unique geographic/WAN location. One IP-SLA capable Cisco router should be deployed at each site.
What is a simulation node?
Each site on your VoIP network is associated with a designated simulation node. This simulation node is an IP SLA capable Cisco router or Cisco switch. VoIP Monitor auto-configures IP SLA on these simulation nodes.
Where can I find out more information about IP SLA?
www.cisco.com/go/ipsla
Where can I find out more information about whether my devices support IP SLA?
From the www.cisco.com/go/fn website,
- click “Search by Feature” and select “IP SLAs – UDP Based VoIP Operation”
- click “Search by Platform” and select your desired platform and image. The device will need to support the “IP SLAs – UDP Based VoIP Operation”