Grandstream GXP 1615 1 line/ 1 Account, SIP VoIP IP Phone

Got a like new phone for £25 after a factory reset quickly configured to use on my Sipgate account. Excellent phone crystal clear sound and easy to use

Got the phone and the same day the screen went blank but the phone still worked.The screen is not back light, can be quite hard to see at the best of times, highly recommend GXP1625 instead.Cannot complain about amazons return policy nor Grandstreams customer service, fantastic.

Just a heads up to those who, like me, will be using this at home without benefit of a system's administrator:These VOIP devices are not that trivial to set up. To set up you need a web browser connected to the same local network. And, of course, you need an account with a VOIP provider which is going to involve paying for it. Maybe your ISP runs one, but it's not necessarily the cheapest. The protocol they use is called SIP which may be a good search keyword.You need to connect the phone to your local area network using an RJ45 cable, quite probably one longer than the one in the box. At this point, if the phone doesn't come to life you need the power lead, also rather short for where I want to put the phone. Don't you just hate transformer plugs?PoE stands for Power over Ethernet. if you didn't know that odds are you don't have it and will need the power lead.Put the numeric IP address shown on the phone's display panel once it's booted up in your browser. Once you have logged into the device's web interface go to Accounts/Account 1/Network Settings where you enter your SIP service details, as supplied by your VOIP provider's web site. Then go to Status/account status to see if you're connected.Once you have got that REGISTERED indication you have the SIP details right. Test the phone. Assuming you can get it to ring, go back the the web interface. It will have logged out by now. Go to ACCOUNTS/Account 1/Sip Settings/Security Settings.Select Validate incoming messages and Check SIP User ID for Incoming INVITE. Maybe it's just my router but before I did this I was prone to "Ghost calls". The phone rings in the middle of the night and shows a nonsensical CLID. SIP systems are a popular target for hackers. You want as much authentication as your VOIP provider can handle.Oh, by the way, if you wall mount you'll find that you can't put the plugs in until the phone and bracket are locked together, and there's probably not enough space behind to get the plugs in after it's on the wall.