Dear hiring manager,
We have great expertise in VoIP, we have developed almost 1000 small application into VoIP technologies. We have a great team in PHP development as well. We also done many projects into integration, you don't find a many projects in our belt but we done many more.
Please share me your Skype id for further discussion,. I am sure we can help in your need. Once you talk with us, you will feel glad to work with us.
Regards,
Jack