Why don’t we start with some trivia?
Did you know that SIP response codes are based on HTTP/1.1 response 
codes?
Actually, SIP response codes are the extent of the original HTTP ones and even define a new class with more response codes. I’ll let you know which one when we get to it.
That said, not all of the HTTP codes are relevant and mapped to SIP response codes, so if you know some HTTP, don’t expect to find them all in this list.
Continue reading SIP Response Codes Explained
Connecting the Cisco IOS Voice Gateway to CUCM via SIP has been the preferred way to do it in the past couple of years.
The slowly dying H323 protocol (ISDN based) is not being developed anymore while SIP (HTTP based) became the industry standard for VoIP. So whenever PSTN connection is implemented via an IOS Voice Gateway, the choice should be really between SIP & MGCP.
This is how it’s done, step by step, using SIP.
Continue reading Cisco SIP Gateway configuration: The Ultimate Guide
This is a second post in the series of CUBE configuration. You can find the first one here.
In this post, I’ll cover some of the more advanced issues and scenarios that most of us are facing with CUBE configuration.
It’s Monday morning, you are checking your Email after a long weekend just to find out that your boss was quite busy and you have been assigned a new project.
The good news? It involves ITSP and CUBE.
And why should you punch it in the face?
To be honest, mostly revenge…
Because one-way audio and no audio problems hurt.
Really bad.
Especially when they hit you by surprise, as they usually do.
There is no way around it,
finding the SIP call flow is the first thing you have to do when you are facing a SIP call failure.
Why?
Easy.
Because first of all, you have to understand whether this is a call routing problem or signaling/media compatibility issue.
SIP call flow helps you understand just that, and in a lot of cases, you can pinpoint the problem just from looking at the SIP call flow.
Need to setup a CCIE Collaboration lab?
Want to practice your SIP skills?
Need to run a PoC with ITSP integration?
Don’t have a spare ESXi server?
No worries.
This is how you install a vCUBE on virtually any PC using free software.
Build pro IOS configs. FAST.
Since Cisco has bought Acano in late 2015 and turned it into their leading product for video conferencing, a lot of questions has been raised on both commercial and technical fronts.
Continue reading Cisco Meeting Server training requirements
Prime Collaboration Assurance deployments (PCA) became very popular since Cisco has started giving it away for free (standard version) with new orders. It is indeed a great tool for those who are willing to make the effort and make it so.
Are you?
Continue reading 5 Steps to ace Prime Collaboration Assurance deployment
As you may know, starting of version 10.6 of Prime Collaboration Assurance packet capture became quite tricky. It happened due to Cisco’s decision to disable Root access on the server. Fortunately, Cisco didn’t quite swallow the key.
Continue reading On Cisco Prime Collaboration Assurance Packet Capture & enabling Root access