The "Networking" tab: Go to this
tab and click the "Settings" button, for the checkbox to
turn off software compression. (Turning off software
compression can increase an "iffy" connection's
stability.)
You can also set your computer to add a "panix.com" to
unqualified hostnames (e.g. if you just type "panix1" into
your telnet program instead of "panix1.panix.com") here.
Click the "Internet Protocol (TCP/IP)" button, then
"Properties", then "Advanced" in that window. Choose the
"DNS" tab, then "Append these DNS suffixes". Click "Add",
type "panix.com", then click "Add" again. (You can get
back to the Networking tab by clicking "OK" in both
sub-windows.)