Just a quick google search I found.
From any display telephone:Press ICM + #*#* + Password + HOLD
.•The default system passwords are:Installer (level 3) = ******
System Administrator 2 (level 2) = ****
System Administrator 3 (level 1) = ****

Try those numbers.

https://www.pbxmechanic.com/manuals/nec/NEC%20DS2000%20(Nitsuko)%20Hardware%20and%20Software%20Manual.pdf

On this same manual the modem connection is
The remote PC must have a modem connected.
Also,the default communications parameters of the CPUserial port are 4800 8 N 1 (4800 baud, eight data bits,no parity and 1 stop bit).

Last edited by Professor Shadow; 06/29/21 04:37 PM. Reason: No passwords in the open fourm per rules.

There is no such thing as stupid questions.
Just stupid answers.