Using the Meta key across Telnet, to a Sun running GNU Emacs

[PTW@JASPER.SCRC.Symbolics.COM (P. T. Withington)]

    Date: Tue, 12 Jun 90 09:56 CDT
    From: lgm@iexist.att.com

    I know this has been asked before, but I have no record of an answer:
    How can I use the Symbolics Meta key across a Telnet connection to a Sun
    running GNU Emacs?  I guess I need either:

    - To send full 8-bit characters across Telnet, have the Sun receive them
    as such, and configure GNU Emacs to recognize the eighth bit as a
    Meta-key indicator.

    - To modify the Symbolics terminal emulator (VT100 or otherwise) to send
    a 2-character escape sequence when the Meta key is used.  That is, if I
    type Meta-v on the Symbolics keyboard, the terminal emulator should send
    Escape and 'v' to the Sun.

It does this in 8.0