Caller ID VOPI. Inspite of the online info below, this is still a spammer who did not leave a message.
Voice Over Private Internet ( VoPI™ ) is an alternative way to deliver IP telephony to customer site. Unlike VoIP which uses a public network, VOPI uses a private network to transmit voice packets.
It may seem like a typo, but VoPI™ completely transformed how Internet-based telecommunications service is offered. Voice over Private Internet, or " VoPI™, is a fully managed solution solves a lot of problems inherent in an unmanaged VoIP (Voice over Internet Protocol).