Yes. Newwall Communications offers cordless phones to provide your business with in-office mobility. If you want to use a different cordless telephone, like ones you already have, we will need to provide you an ATA. We’ll connect the ATA to your router and connect your cordless phone to the ATA. This will allow the ATA to convert the digital phone line to analog so it works with your existing phones. However, remember that many of the amazing features that come with the Newwall Communications VoIP system may not work with your existing cordless phones.