Telnetting into the PortServer (II or TS) is successful, but you may get double CR/LF, so the device on the end of the serial port sees 2 CRs and login fails.
This is a known issue with the Windows Telnet Client.
1. If you use a different telnet client, the double CR/LF issue should be resolved and a login should be successful.
2. On the TS product line (not on the Portserver II) you can issue the following command as a workaround:
- set telnetip ip=IP_ADDRESS mask=MASK_VALUE mode=striplf
May 09, 2019