When I looked at the manual for the Lantronix UDS1100
I did not see any mention of it being able to be used as Telnet client.
PDF Page 54.
You put it in manual CONNECT mode, modem emulation, and type
"ATDT10.20.30.40:23" on most modern Lantronix devices. I have no personal
experience with the UDS1100, but I've got the UDS10 and UDS100 devices kicking around
the shop.
Thanks,
Jonathan