GrandstreamGXP2170 IP Phone | 12 Lines, 6 SIP Accounts | 4.3-Inch Color Display | Dual-Port Gigabit Ethernet with Integrated PoE

I have tested every IP phone I can get my hands on from a myriad of manufacturers. Cisco has great engineering, good voice quality, low latency, but they have no BLF keys (or very few to speak of). Fanvil has great BLF keys which allow for pages of keys which works perfect, but the phone has quality issues and cuts out. Yealink has some decent phones, but their flagships like the T48g have major latency on their audio. Note, this is not network related latency; every phone takes time to process the packets, and some do it MUCH faster than others (my testing has yielded about a 200ms gap in the speed of processing the voice packets from different phones and manufacturers).This Grandstream feels like a quality product, the screen is bright and brilliant, the pages of BLF keys is a perfect fit. Sometimes the screen doesn't move quite as fast as my hands do when I'm moving very fast, but it doesn't matter because the phone processes all key strokes faster than it displays on screen, meaning I am not limited in how fast I can move despite a 100ms delay on screen sometimes. This phone adds about 60-80ms in additional latency over my "fastest" phones I am saying are zero. I would like to NOT have that added latency which can add up when you top it with 250ms of latency from your SIP provider/internet, but the voice quality is outstanding and I know that is the likely cause of the delay. Much more and it would be outside what I'd accept; much less and I'd have a hard time measuring it (I can measure down to about 30ms).Great phone, about to buy a bunch more for our managers.

Ordered this phone as it was cheaper than from the service provider. Works as it should very happy with it.

I just installed my first GXP2170 and am happy with it so far. I am using it on a 3CX PBX and it was easy to get working. It has a nice screen and the audio is great on both the handset and the speakerphone. I have not tested the Bluetooth capability yet, but that is a nice feature to have. It comes with a power adapter, but I am not using that as it supports POE and that works fine. It also has a desk stand and a wall mount. I was a bit disappointed in the shipping as Amazon shipped it without boxing it up in another box - the labels were stuck directly on the manufacturer's box and it was not sealed with tape so I am lucky I got everything intact and undamaged.

Update 2021-05-18Just installed latest firmware. BIN file properties say March 2021. STILL NO BLUETOOTH HEADSET VOLUME CONTROL. How absolutely STUPID is that?This is a GREAT PHONE that does EVERYTHING I WANT IT TO EXCEPT ONE LITTLE THING. ONE!!!! ONE THING!!!!AAAAAAAAAARRRRRRRRRRRRRRGGGGGGGGGGGGGGGGHHHHHHHHHHHHHHHHHHH!!!Original review:Quick setup. Good audio. Looks like nice features.BUT...I bought this for the sole purpose of using a bluetooth headset. My headset connected OK, sounds pretty good.But the volume control on the phone does nothing for a BT headset. The volume control on the BT headset does nothing when connected to this phone. I found a 'bluetooth compatibility list' on Grandstream's web site and it specifically states"Volume adjustment and redial are not implemented".Uh.... WHAT???Unacceptable.Please please please realize that the ability to control the volume on a headset, during a call, is CRITICAL.I put in a support ticket with GS. I will return here after I get a response, and will absolutely return here if the fix it.

Ordered a few of these for my office, and have been very happy with them so far.I'm running them using the INCLUDED adapter.Works well with my Plantronics Voyager legend.Currently using them with FreePBX running asterisk 14.THE ONLY issue that * I * have run into yet, is that the the two most recent FW versions have an issue where the WebGUI has new features that are blank. As in there is a menu option for the new feature, but when you select it, you get an error or blank page. Have tried resetting and reflashing, downgrading then upgrading, no luck.But OVERALL, i have had no issues with the phones performance or screen-Gui features.

Used this for a few weeks on a freepbx/pbxact SIP system. This phone is nicer than the s705 sangoma phones we bought initially. The call quality is better, the speaker is better, and the screen is marginally better. The phone is also more sturdy than the sangoma.However the display remains very difficult to see unless you're straight on. The phone has an inexpensive plasticky feel.Yealink and Polycom both make phones that are higher quality IMO, but I'd buy this over the sangoma phones simply due to consistent speaker/handset quality. This is certainly a cheaper option that shouldn't be completely dismissed.It doesn't work with the pbxact contacts manager and other xml apps, but there's plenty of ways to work-around that.