Come along with me as I start a new journey to earn the CCNP Collaboration Certification. I will be studying and blogging about my studies for the CLCOR 350-801 and welcome you to learn with me. In a little over a month I will finally wrap up a degree that I've spent the past few years working towards and with…
Far too often I need to search for phones or extensions based on a criteria that CUCM doesn’t provide a way to search for. This could be the DN associated to an end user, or the Caller ID mask on a DN. Luckily, just because the Web GUI doesn’t provide the ability, doesn’t mean we are completely SOL. I’ve found…
As you may have already noticed, my blog is missing a TON of content today. It's because I've decided to migrate my blog to a managed wordpress solution. I initially set up this blog on AWS using a community wordpress instance. Unfortunately, as my blog grew, the instance became less and less stable, to the point where I couldn't even…
Note: This isn’t a configuration guide to Standard Local Route Groups in your CUCM. This is really more of a document to help you understand how it works. If there is any interest, I may go back and create a document or video showing how to actually build this. Section 1 – Normal Call Flow Here is what CUCM call flows…
Earlier today I was asked by a coworker to assist with a new fax server. They needed a SIP trunk set up and after getting everything up and running, I recommended to him implementing a QoS policy on the server because Windows strips all QoS before sending out packets. I learned this a while back when troubleshooting issues with Cisco…
Introduction Fax over IP (FoIP) is a topic that most collaboration engineers hate. And when I say hate, I don’t mean they just dislike it, they HATE it with the burning rage of hell. One Cisco Live video I watched described fax as “the cockroach that just won’t die.” Because I work in the healthcare environment, I have to deal…
The basics A few days ago, on July 17th, 2020, the Federal Communications Commission published a new order, FCC 20-100, requiring all phone providers implement 988 as a new emergency number to the National Suicide Prevention Lifeline. The Lifeline, already in existence since December of 2004, is currently maintained by the Assistant Secretary for Mental Health and Substance Use as…
Key Terminology VOIP: Voice over Internet ProtocolPBX: Private Branch ExchangePSTN: Public Switched Telephony NetworkITSP: Internet Telephony Service ProviderSIP: Session Initiation ProtocolSCCP: Skinny Client Control ProtocolMGCP: Media Gateway Control ProtocolURI: Uniformed Resource IdentifierRTP: Real-Time Transfer ProtocolSDP: Session Description ProtocolCUCM: Cisco Unified Communications ManagerSBC: Session Border ControllerCUBE: Cisco Unified Border ElementCodec: The algorithm used to encode/decode samples of audio. This algorithm dictates the sample duration and size of packet. (Look into the Nyquist sampling theorem) How a VoIP system…
This document is just a basic overview of how Informacast works. This is not an in-depth analysis, but should be able to provide a basic understanding of how the system works to help troubleshoot. Signaling The paging extension is a CUCM Route Pattern in your main phones partition that points to the Informacast_SIP_RL Route List. This route list contains both…
About a year ago I compared and contrasted different SFTP options for backing up your Cisco Collaboration Infrastructure. At some point after that I learned that Windows Server 2019 integrated OpenSSH directly. Being that it is a Cisco supported solution, the choice is obvious. The free solution with unlimited file size is obviously the best choice. Today I’m going to…