I use X-Lite by http://www.counterpath.com but my VOIP system itself is hosted by my employer. The software is easy to use and I've never had echo or connectivity problems unless my personal internet goes down. You may want to take a look at their website see what providers you can find.
If you have only 2 employees then phone system like virtual PBX, VoIP phone system or hosted PBX phone system are the suitable system to use. You don't need to issue IP phones for them. These phone systems are capable of using virtual extensions wherein your employee's mobile number can be assigned as an extension to your system.
You may want to check the Virtual PBX Compare site:
for a feature charts of different providers. You can use this as your reference if you may please to do so.
Hosted PBX is the service you are looking for. It gives your business the feature rich phone system.
Your concern that if we get each employee an IP phone and they quit, it will become an issue to get these phones back then let me tell you it is not an issue at all. What you can do is instead of giving IP Phone to everyone in the office you can install softphones on their cell phone.
I have been using services of The Real PBX as suits my business requirements.
I'm new to the forum and have another question about PBX VoiP. I saw the answers to a previous poster, but wanted to see if anyone has a similar situation to mine and the best solution for it. Our workforce is nationwide and we have two employees that have until now not needed to accept calls from clients. As part of our growth, they will need to take calls and we are anticipating adding more employees at remote locations in the next year who will do the same.
We currently utilize a reception service, which is great for calls coming to the main office, but they have no online interface to route calls different, allow us to have multiple phones ring at once, etc.
I realize a PBX can handle all those features and was looking into Speakeasy. My concern is that if we get each employee an IP phone and they quit, it will become an issue to get these phones back, set someone else up, etc. Do we have to have the VoiP phones? Do any of you recommend one service over another? Voice quality and customer service are two very important features as I can't stand calling and having that echo-y sound, or trouble hearing at all - and I also don't want to call India for support.
Any suggestions appreciated.