user manual

1-7
User Guide for Voice Health Monitor
78-11324-02
Chapter 1 Voice Health Monitor Overview
Overview of VHM
Device classification
differences between VHM
and DFM
VHM and DFM classify devices differently. For example, Cisco routers
and Catalyst switches are managed by both VHM and DFM. However,
DFM classifies Cisco routers as Router class, while VHM classifies
routers as Voice Gateways.
Note VHM only manages Cisco routers and Catalyst switches that
have VoIP cards or ports. See the “Device Types that VHM
Manages” section on page 1-9 for more information.
Polling and threshold
parameters between VHM
and DFM
Threshold parameters for voice-enabled routers and switches must be
set in DFM. However, threshold parameters for media servers must be
set in VHM and are not shared with DFM.
Polling parameters are not shared between VHM and DFM. However, it
is best to synchronize them to avoid inconsistent polling of devices.
Therefore, it is recommended that you set polling intervals the same in
both VHM and DFM.
Table 1-1 Interdependencies between VHM and DFM (continued)
Component or Feature Description of Dependency