Telnet'ing to Symbolics

[Swab@CHARON.arc.nasa.gov]

 When at Symbolics#1 I log onto a Sun and then telnet to Symbolics#2
 that allows background logins.  How can I then exit the Symbolics#2
 environment and return to the Sun without logging out of Symbolics#2?
    (I really did intend for the #1 and #2 to make it clearer...)

Thanks, Rod.