Are you sure it is a Logo?
Sorry if this comment is too obvious, but if it is near a test point or wire connection it may be intended to identify telecommunication, especially if there is no known supplier using that logo.

On Wed, 13 Jun 2018 13:58:32 +0000, [log in to unmask] wrote:

>Fellow TechNetters:
>
>   Is anyone out there familiar with the PWB symbol of " TTY "?    I don't have a pic of the symbol just the letters.
>
>Victor,