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Being Kx-TGP500 a DECT GAP unit it should accept registration of any kind of DECT (GAP) headset. I wasn't able to find any docs from Panasonic stating exactly what kind of features could not work using any other headset instead of KX-TPA50 which is recommended with this.
A: No, the handsets are very specific to the bases. If you are able to register a different handset other than what is supported, we cannot say which features will or will not work.
Q: Can the Panasonic kx-tgp500 be used as a wireless IP-PBX without pairing it to a VoIP controller like Asterisk or 3CX. Also can a PSTN VoIP gateway be connected to enable external inbound & outbound calls. If not how does external inbound & outbound calls are been made.
A: No it can not be used as a wireless IP PBX. It is just a SIP phone
You will need some form of phone service connected to the phone
Our Go-To Wireless Solution
The Panasonics are reliable with good wireless coverage in the DECT frequency range.
We have to ding them for usability simply because a cordless phone doesn't have the physical room to be nearly as user-friendly as a desktop phone (lack of buttons and screen size). Transferring calls, parking, and voicemail usage requires more training than any desktop device, but, when you need a wireless solution, we're happy to deploy the Panasonic KX-TGP500 solution - and one base unit supporting up to 6 phones and 3 simultaneous calls really increases the value.
It has been several months since I first used the Panasonic wireless phones. Easy to setup. I have them in three different locations and work great. At the office, at home and at a second home also. Much better than using analog phones with ATAs.
These phones look and feel very nice. Great quality and decent range on the wireless. The system in a whole is a great meld of voip and pots functionality without needing a full fledged pbx. You don't have the full pbx functions, but you have a good start with the basic ones.
They work great for home use, home + office use, and even small business depending on your exact needs. I am recommending these to our voip customers to use at home instead of using an ATA with several analog phones. It is about time we have true digital end to end phone calls, and these units will ensure that your side is as clear as possible.
I only have two complaints. The price could be a little cheaper for each handset. And the low concurrent sip call count could cause some trouble. For some small offices this may not be enough, but for many homes who are use to a single or double pots line, this should be plenty.
Doc'ing 1 star as these are great for residential use, but the price is just to much per handset.
I have been using this phone and is a great alernative to a corded SIP phone. It looks like a regular cordless, but with all the features you would expect from a VOIP phone.