We had been using Grandstream GXP-2010s and then the GXP-2110 HD when it was released. As Bill said, we’ve had problems with the power supplies on the older Grandstreams going bad. (FYI when they “go bad”, they don’t just stop working all together. They just start behaving badly. Sometimes, they won’t boot up completely and often have many of the BLFs turned on. However, other times, they appeared to boot up OK, but then just wouldn’t work properly.)
The Yealinks have more features like:
- You can configure the DND button to send a feature code to the server rather than just activate DND locally in the phone
- The phone supports OpenVPN
- The phone supports cordless headsets with electronic hook switch control that allows the user to answer calls by pressing a button on the headset
I don’t like the way the Yealink BLFs were designed with the label sheet needing holes cut out of it for the buttons. It’s a pain. But I did find a place that will sell pre-cut label inserts. I haven’t ordered any yet, but plan to do that soon.
Grandstream’s firmware has not been as “mature” or “stable”. Early on, they would fix some things after a period of time. But they made the GXP-2010s “end of life” quite a while ago, and are no longer supporting them. They’ve got 2 very annoying bugs that will never be fixed: The BLFs don’t always show the correct state of the line being monitored, and speed dial numbers can’t have any digits repeated (i.e. ##70# to park a call won’t work because the phone sends it as #70#).