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Tech Notes

Advanced technical notes for technicians, professionals and extreme power users.

7 articles

• Alarm Panel Recommendations for VoIP Lines Alarm panels can be tricky on VoIP because they were designed for traditional copper landlines. This article explains how to make alarm panels work…
• EMAK Telecom Call Center Queue Settings The EMAK Telecom call center routes inbound calls into queues and distributes them to agents on your phone system as agents become available. The…
• EMAK Telecom Firewall Whitelist: Domains, IPs, and Ports If your company has specific security requirements, your router or firewall may block access to EMAK Telecom services. In that case, you may need…
• Enable Bridge Mode on a Bell Home Hub 1000 If you are using your own router, place your Bell modem in bridge mode whenever possible. Bridge mode helps prevent the modem and router…
• Fixing Let’s Encrypt Root CA X3 Expiry on Yealink Phones Let’s Encrypt’s DST Root CA X3 certificate expired on September 30, 2021. For most users, the expiry passed unnoticed. For embedded devices like Yealink…
• How to Add BLF Keys to a Grandstream GXV3275 The Grandstream GXV3275 supports Multi-Purpose Keys (MPKs), which are virtual buttons you can place on the home screen. Configuring an MPK as a Busy…
• How to Improve VoIP Call Quality Poor VoIP call quality — choppy audio, dropouts, “can you repeat that?” — is almost never about not having enough bandwidth. The real culprits…