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A customer contacted me with an inbound call issue. Inbound calls were taking at least 30 seconds to connect, and some would not connect at all. While I've experienced call delays before, the root cause was different each time I investigated. Since the issue was happening so frequently, I took a SIP trace from their Audio Codes Gateway. I noticed the following pattern in the SIP trace: INVITE SIP 183 INVITE SIP 183 CANCEL 200 OK If everything was working correctly, *I should* see the SIP 183 answered with a '200 OK' rather than an additional SIP 183. My initial thought was, "Why isn't the carrier answering my 183 message?" I spoke with an engineer from the carrier (AT&T) and he provided logs from his end showing they were, in fact, answering my SIP 183. The customer side, however, was not sending the SIP 200 back to them. What's going on here? The carrier's log proved they weren't causing the problem. The other time I've exper...
I haven't worked much with IIS ARR . Most of my customers prefer either a F5 or Kemp for their load balancing solution. I recently worked with a customer who did not have a solution in place and did not want to spend money on a dedicated appliance. Necessity is the mother of invention learning something new. 😀 A colleague of mine forwarded me this article he had used previously to setup IIS ARR for another customer. While the article is several years old, it's still an excellent resource and I would recommend bookmarking it. The guide in the website linked above walked me through most of what I needed for the setup. I finished the configuration steps and signed in on my Android phone via a test account the customer provided me. I added the customer to my contacts list and sent him an IM. Everything was working alright until my account was logged off without warning and I received the error message below: I wasn't sure what to make of this error. My mobile p...
Documentation is useful, but in my experience, it's one of the last things that gets done. At my last job, I was on a team of four people who supported over 20,000 Lync 2013 users. My day to day, tactical activities took precedence over writing wiki articles outlining server details, DNS entries, and other details. To be clear: I documented things, but it was often after hours. I spent most of my normal business hours keeping my users content and the environment stable. If only there was a quick way to produce documentation about a Skype for Business environment... Spoiler Alert: lucky for us, there is. 😏 A colleague of mine mentioned this super helpful tool . The Skype for Business Environment Report is a collection of PowerShell scripts that pull information from your Skype for Business topology and output the data into a Word Document, Visio Diagram, or both. Below is a list of steps to help run the scripts: 1. Download and unzip the file on a front end...
Taking the 70-333 Exam soon? If so, you'll want to check out this book written by Michael Tressler (aka, flinchbot ). I found this book super helpful when preparing for my exam (which I passed in April 2017, by the way, with a 975 😉) and it does a really good job of covering all aspects of Enterprise Voice. Hands on experience is the best teacher, in my opinion, but I would recommend using this book as a study/reference guide. Time to study for my Office 365 Exams. MCSE Productivity , here I come!
