[Graleyne]

I looked it up and this is what I found:

"IP Relay allows people who have difficulty hearing or speaking to communicate through the telephone system with hearing persons. IP Relay is accessed using a computer and the Internet, rather than a TTY and a telephone. So individuals who use IP Relay do not need to invest in a TTY; they simply use the computer to communicate by text. When conversing over IP Relay, people who are deaf, hard of hearing, or have difficulty speaking can participate in a conference call or go online while holding a conversation."

Sorry I can't be of more help.