Category Archives: Networking
Understanding Video and Network Latency in AV Systems
Latency is one of the most important factors affecting the performance of audio and video systems. Whether you’re working with a videoconferencing system, a live presentation, or a distributed AV-over-IP installation, excessive latency can cause noticeable delays, synchronization problems, and a poor viewing experience. Understanding where latency originates, how it is measured, and how individual […]
SIP Video Conferencing Calls Dropping After 15 Minutes: Causes and Solutions
When troubleshooting SIP-based video conferencing systems, one particularly frustrating problem is a call that connects successfully but disconnects after a consistent amount of time. In one case involving a video conferencing environment, SIP calls were dropping at approximately 15 minutes, despite establishing successfully. Initial troubleshooting suggested that the problem was related to SIP session timers, […]
TCP/IP vs. WSD Printer Ports: Differences, Setup, and Troubleshooting
When installing a network printer in Windows, you may notice two different types of printer ports: Standard TCP/IP Port and WSD Port. Both allow a computer to communicate with a printer over a network, but they work differently when discovering printers, managing connections, sending print jobs, and reporting printer status. Understanding these differences can help […]
Understanding Email Authentication Headers: SPF, DKIM, and DMARC Explained
Email authentication plays an essential role in protecting against domain spoofing, phishing, and unauthorized email delivery. Three key standards, SPF (Sender Policy Framework), DKIM (DomainKeys Identified Mail), and DMARC (Domain-based Message Authentication, Reporting, and Conformance), work together to verify sending servers, validate message integrity, and confirm that authentication aligns with the sender’s domain. Understanding how […]
How to Temporarily Disable Cisco Duo Windows Logon for Emergency Recovery
Cisco Duo is a multifactor authentication (MFA) solution that adds an additional layer of security to Windows computers by requiring users to verify their identity during the sign-in process. However, there are situations where Duo can prevent an IT technician from accessing a computer to resolve an underlying problem. For example, a laptop may lose […]
Troubleshooting Content Sharing Issues on Video Conferencing Room Systems
Troubleshooting Content Sharing Issues on Video Conferencing Room Systems Content sharing is an essential feature of video conferencing room systems, allowing participants to share presentations, documents, and computer screens during meetings. However, problems can occur when shared content fails to display, replaces the main camera feed, or appears as a black screen. These issues are […]
Rack Cabling, Labeling, and Rack Design Standards
A clean rack is not just about appearance. Proper rack layout, cable management, labeling, power design, and thermal planning directly affect system reliability, serviceability, troubleshooting speed, and long-term support. Whether you are building a conference room rack, broadcast support rack, classroom AV system, control room rack, or equipment enclosure, the goal is the same: every […]
So You Want to Be a Hacker, Eh?
Let’s get one thing out of the way first. No, this is not about breaking into your school’s grading system, guessing your friend’s Instagram password, or “testing” your neighbor’s WiFi. This is about ethical hacking, also known as cybersecurity, where people are actually paid to find problems before the black hats (Malicious or Illegal hackers) […]
Windows 11 – Quickly Open the Manual Printer Add Dialog<
Windows 11 hides many legacy but extremely useful administrative tools behind modern UI layers. One of these is the classic PrintUI utility, which allows you to quickly access advanced printer installation dialogs without navigating through multiple Settings menus. This is especially useful for IT administrators, MSP technicians, and anyone troubleshooting printer installs, driver issues, or […]
Microsoft – Shared Printer Error “0x0000011B”: “Cannot Connect to the Printer”
What does this error mean? When attempting to add a shared network printer, you may encounter Error 0x0000011B (“Operation failed with error 0x0000011B”), which prevents the printer from being installed. This issue is most common in small office and home office environments and typically stems from a Windows security update that tightened RPC binding authentication […]