Do the following. Whenever you get bad quality call, press ? (info button) twice on the IP phone. If you see a lot of dropped packets you likely have QoS issue. If you don't see dropped packets you might have issue with PSTN interface (PRI, R2, FXO, etc.)
Dropped packets means that your RTP packets are getting lost somewhere between the 2 endpoints. I could only see it being a qos issue if you have qos configured and the amount of VOIP rtp traffic is exceeding what you have configured in the priority queue. Otherwise, you may need to explore where the packet loss is occurring, whether it be on the WAN or LAN.
1. Introduction Internet security is important with the increasing
attacks that are happening every day. Many internet and browsing
security solutions exist, but some are not very easy to use or maybe the
question is how can I enable them? In this referen...
Cisco Software Manager Server API Guide This document describes the
programmatic interfaces, RESTful APIs, which are supported by Cisco
Software Manager Server (CSM Server). Overview CSM Server supports a set
of finite RESTful APIs. The first step to use ...
If you are using Cisco's new linux-based Cisco Software Manager server,
then you probably want to make sure there is a startup service for
it.I'll assume that you've already installed the CSM server on a
systemd-based linux system. The commands given belo...