Planet’s VIP-156PE SIP PoE Telephone Adaptor is an easy-to-use-and-install PoE Analog Telephone Adapter, providing the same voice quality and reliability that users have come to expect from Planet’s ATA devices. The VIP-156PE is a single port Analog Telephone Adapter which, allows you to use your existing analogue phones or fax machines to make calls via the internet. The VIP-156PE supports T.38 fax and operates with most SIP-based Internet service providers (ISP’s). It’s a great choice for voice service providers because it’s completely customized auto-provisioning and auto update. If you want to have the world's leading VoIP service, you need to have the world's leading VoIP device!