Grandstream IP Phone GXP1625

I bought this phone to use with the AREDN network and it was super easy to configure! Would definitely recommend getting this phone

Set-up directions from the manufacturer were grossly inadequate and factually wrong. I spent many hours with Amazon tech support trying to get these set up. Most of the 7 reps I spoke with were useless. Two techs were really persistent in finding information to help, but were unable to connect with the manufacturer when that was needed to set up voicemail. I was never able to keep both phones working at once. One was always a problem. I submitted an online request to Grandstream (since they won’t accept calls), but they never responded. Consequently, I was never able to set the phones up for voicemail. What a waste of many hours of frustration. I’m going to return them, since they still don’t work properly.

Wie in anderen Rezessionen bereits angemerkt, die Einrichtung des Telefons läuft weder einfach noch intuitiv, ich selbst habe davon auch nicht viel Ahnung, aber es gibt dazu sehr gute Videos auf Youtube, auch in deutscher Sprache und damit war es dann am Ende nicht so schwer.

Mann kann an dem Ding wirklich alles einstellen, nach einer Stunde war das Telefon upgedated und an der Fritzbox so eingestellt, dass ich nun auch Anrufe weiterleiten kann und sich das Display bei Nichtbenutzung dunkel schaltet, der Klingelton annehmbar war und die programmierbaren Tasten machten was ich will.

Für den Preis ein super Telefon mit schweren und soliden Hörer und wirklich guter Sprachqualität, wichtig war mir auch ein Anschluss für ein Headset und hauptsächlich natürlich, dass es über das Lankabel der Fritz Powerline läuft, weil am Einsatzort kein klassischer Telefonanschluss vorhanden ist.

Die Tasten haben natürlich keinen so soften Druckpunkt wie bei teureren Modellen, sind aber auch nicht klapprig, für den Preis empfinde ich sie als absolut akzeptabel.

Was ich etwas schade finde, ich habe es nicht geschafft auf das Telefonbuch der Fritzbox zuzugreifen, entweder liegt das an mir, oder am Telefon, da bin ich mir nicht sicher.

Dieses Telefon ist absolut nichts für den Liebhaber von „plug and play“, entweder muss man da Ahnung haben, oder man muss sich eben „aufschlauen“, wer aber die Einrichtung seiner Fritzbox hinbekommen hat und sich ein paar Videos auf YT reinzieht und etwas Geduld mitbringt, der kann das, wie ich auch, ohne große Vorkenntnisse tatsächlich hinbekommen.

The phone works really well. Relatively easy to configure if you know the basics of networks and VoIP. For those that do not, this is not a regular landline telephone and it will not work as such. It can be used with the supplied handset, a headset, but it also incorporates a speaker, which is useful to place some calls with decent sound quality (obviously, it sounds better with the handset). Some of the buttons can be programmed as speed dial, which is great. If you just have a couple of regular numbers to call, communication can be established pressing just one button. There is also a full agenda funtion that allows you to store as many numbers as you like.
I own two units. One of them has been in use with POE supply for more than a year without any issues. The other one was just bought and it is working well with the 5V PSU included. The box also contains a network cable for connection to the router.

The phone is a good product. The advertisement did not mention it had to come from the US. So, I had to pay 196kr customs duty. Also a power adapter from US to EU connection was not in the package and we had to order separate. So, it is faster delivery and more cost effective to order the phone at a real Swedish shop instead of Amazon.

I use these in the office. It is great that it has an online interface. And many providers have just firmware you can download.

I personally don’t use the wall wart, but it does work with that if you don’t have POE. But cleaner setup with just POE if you have it.

Good phone, easy menu. Will definitely buy again

A basic 2-line phone that sets up fairly easily on a FreePBX system – which is what most PBXs are based on, even if they’re not the free one. Read the user guide – which will explain the buttons in greater detail. Sound quality is excellent. One note for provisioning — it’s a pjSIP, not a chan-SIP. Made a mistake in setting it up in FreePBX with one of the lines going to a PBX extension defined as a chan-SIP. Changed it to pjSIP and that line connected like magic.

Update almost two years later:
Still very happy with this phone. It’s important to not this isn’t a Plug-n-Play idiot-proofed Joe Consumer device. It’s made for installation with a real PBX and presumes whoever is installing it knows what they’re doing with a PBX, its settings and configuring it and a VoIP phone for it. There are no guard rails to keep you from going over a cliff. Many SIP providers are using ULAW audio codec. Trying to force G.722 for HD can result in flaky operation with intermittent one-way audio (you can hear them but they cannot hear you) – as something in the path is attempting to transcode the G.722 to ULAW. One of the nuances in getting a personal PBX and VoIP working properly. Getting its firmware updated was a challenge as I’m a home user, not a medium or large business with server provisioning, etc. Did finally get it to go after fussing with a Windows TFTP server that could be started and stopped after the update occurred. Took some reading about how to do this on Grandstream’s site and a little persistence. Fortunately, that’s not something that occurs very often (it’s actually rare). Phone does what it needs to do. I personally believe most problems are PBX configuration, not the phone. Also took some tweaks in FreePBX settings to get the voicemail and missed call flags working correctly with the PBX setting and clearing them. Overall I remain extremely pleased as it’s a convenient two-line extension placed elsewhere in my home to prevent scrambling to get to the other one. It’s extremely cost effective compared to other phones (e.g. Cisco, Polycom, etc.)