Grandstream GS-DP715 DECT Cordless HD Handset for Mobility VoIP Phone & Device

I installed this in our home with four handsets and an Asterisk PBX with Flowroute SIP trunk. The DSP has great voice quality, echo cancelation and noise reduction. I sound better with this phone using G711u codec than I do in person! The handsets lack some features, custom ringtones, backlit keypad, headphone jack, each user can have a different extension and voicemail, (at the PBX) so there is no need for multi line. The configuration is similiar to other ATA's, I've heard people say it's difficult. There is an owners manual available from the Grandstream website that is easy to follow, but I have VoIP experience. Overall, for the price I am extremely satisfied! Bravo!

First of all a bit of background. I bought this as a replacement for the gigaset a580 IP manufactured by Siemens which I had for 5 years. (It is sold on Amazon too) As I travel frequently a voip phone is a vital communications tool. I think I am computer literate since I am Microsoft, Cisco and Linux certified..The phone arrived promptly all wrapped up and neatly packaged.The manual was a bit iffy (non intuitive ) but there are support pages on the web. I configured the phone, logging the steps taken and made my first call to verify that it worked. However the configuration was hit and miss with no errors to indicate miss stepsand a poorly designed web .guiMy first grief was that unlike the gigaset a580 I could only load one sip account at a time. Since it was a cheaper product, that was a blow I could roll with. the configuration was hit and miss with no errors to indicate miss steppedDialing is hit and miss, to get a connection I would have to dial around 5 times on average.At first I thought I had configured it wrong, then out of the blue with no changes made it would connect. This is totally unacceptable.I can confirm that it is not a connection issue.because I have the same accounts configured on my smartphone using the mobilevoip app and I do not have this problem.To me this product should still be iin the testing phase and Amazon should seriously look at the claims the company are making on product performance. I have now stopped using it altogether and would advise anyone looking to spend their well earned money on this product to seriously beware.I have looked at Grandstreams youtube videos for this device and it leaves a bad taste in my mouth. Because I feel the endorsers are only sayiing what they have been paid to sayThe only thing that can restore my confidence(in the company not the product ) is if I receive a refund, but as I am not going to be in the USA for another six months that seems unlikely.

The plastic is OK for the price, nice to hold and light weight. More comfortable to talk than a mobile phone because it's longer. The main con is that it's does not support HD voice or any wideband codec. And I don't think DECT 6 supports it. DECT has a new standard CAT-iq for IP phones. The size is perfect, nothing to block your desk or table or stand. The front indicators are nice to show if you are connected to the internet and registered with your SIP provider. This is important if your base in installed somewhere via a wifi bridge or powerline, that are less reliable than your modem/router.The screen is pretty big and the user interface is rather good, like Nokia phones in the pre-iPhone era. The manual that comes with it only shows you how to get it's IP so your browser can find it and configure it. You can google the actual user manual online before you decide to buy it. There's nothing wrong with the sound and the range of DECT is much better than WIFI of course. The blue black light is off unless you do something on it, exactly the same as a non-smart mobile phone if you remembered. So there's no back light even if the phone is on the stand.If there is problem with the setting or the performance, it could be due to your SIP provider rather than the phone. The SIP standard is old with many options and implementations. The latest phones hardly need any settings if the SIP provider is good with them. I use Callcentric (can I do promotions ?). Their online support list the few items that you need to enter, and say no if you see STUNT and that sort of things.Ex giant Siemens gave up Gigiset long ago and I got the gem 510 IP at close out for less than this phone. It supported HD voice - once tried and I'm addicted. But the user interface is so bad compared to an Android that I returned it. I regretted it because I just needed the phone to talk while all the fancy stuff I can do it on a soft SIP phone using Android, like caller ID reader, custom ring tone / announcer. You can still use your phonebook on your Android and initiate call with it, but talk on the cordless.Because I seldom use landline and that's why I am going IP. Since HD voice phones are hard to find for a price that I seldom use, I tried using my old Android as a soft SIP phone. I have great problems with delay and echo. Finally I have to get a bluetooth handset for the android to deal with them. And even if your wifi is perfectly covered in all corners of the house, once in the yard your phone is on your own fending itself from all your neighbour's routers. So, I don't think DECT can be replaced, not with WIFI anyway.First I got the Grandstream corded IP phone because it's cheaper. I have an old wifi router configured as a bridge so I can install the phone anywhere with wifi coverage, and can also act as a poor men's cordless SIP phone. I'm happy with the HD voice, and the configuration via browser. But that is big and not a true cordless. So I go back to DECT with this.

Teléfono de buena calidad en acabados y materiales. Se tuvo que regresar ya que no era compatible con el conmutador.

A+++

Uno, se non l'unico prodotto sul mercato con queste caratteristiche. Do solo 4 stelle perchè l'alimentatore è di tipo Uk. Dovete acquistare a parte un adattatore per la presa EU

Very good product and service of amazon is fantastic.

Works perfectly and with interesting undocumented features! I've seen this before in some products - it's probably designed to remind people that VoIP phones may not be able to dial out to an emergency number.Edit: I've had the phone for a couple of months - it has proved reliable. The undocumented feature only happened when I first started with the phone, now it behaves normally. No problems with this phone - highly recommended.