I have a hosted VoIP service to a 3rd party provider (they are run 3CX servers). We have a few public T1s back to their network to cut down on latency running through a 2821 running the latest 12.4T image. At random times phones and calls just drop off and will not reconnect. I am thinking this is a NAT issue as when we setup a GRE tunnel there are no issues and all phones work. Are there any commands I can run on the router to improve NAT when SIP is concerned? Do I perhaps need a different image to improve SIP? I didn't think so initially as we aren't doing anything special from our end, just mainly connecting to the provider.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...