Can't find login and password from nb-o01 printserver(for default)

This needs to be discussed in different situations, you can check whether these situations can solve your current problem.
Scenario 1: All Default Passwords Are Changed and All Passwords Are Forgotten If you change all default passwords and forget the console port login password, all STelnet/Telnet login accounts and passwords, and BootROM/BootLoad passwords:
·For a switch that has the PNP button, you can press and hold the PNP button for more than 6 seconds to restore the switch to factory settings and restart the switch. The following figure shows the PNP button.
·If the switch does not have the PNP button, return it to the factory for repair.
Scenario 2: Default Passwords Are Forgotten For S series switches running V200R020 and later versions, no passwords are configured for default accounts, and users must configure new passwords for logging in to the switches. In this situation, scenario 2 is not involved.
However, for S series switches running versions earlier than V200R020, there is no default STelnet/Telnet login password, but there are default console port login password, default BootROM/BootLoad password, and default web login password. These default passwords may vary according to the switch version.
If you always use the default passwords and have not changed the passwords, you can obtain the default accounts and passwords according to S Series Switches Default Usernames and Passwords (for enterprise users or carrier users). The permission level of this document is C (customer support level). If you need to upgrade the permission level, see the help document on the website.
Scenario 3: The Console Port Login Password Is Forgotten Three methods are available to recover the console port login password.
·Method 1: Log in to the device using STelnet or Telnet and change the console port login password.
·Method 2: Clear the console port login password in the BootROM/BootLoad menu and change the console port login password.
Scenario 4: The STelnet/Telnet Login Password Is Forgotten ·If you forget the login password of an STelnet/Telnet account, you can use another STelnet/Telnet account with administrator rights to log in to the device and reset the password. For details, see Method 1.
·If you forget the passwords of all STelnet/Telnet accounts but can log in to the device through the console port, see Method 2.

Method 1: Use an STelnet/Telnet Account with Administrator Rights to Log In to the Device and Reset the Password

1.Log in to the switch using the STelnet/Telnet account with administrator rights.
2.Change the STelnet/Telnet login password. The following example describes how to change the STelnet/Telnet login password of VTY0 to VTY4.

Method 2: Log In to the Device Through the Console Port and Set a New STelnet/Telnet Login Password

If you forget the STelnet/Telnet login password but remember the console port login password, log in to the switch through the console port and set a new STelnet/Telnet login password.
Scenario 5: The BootROM/BootLoad Password Is Forgotten but the Console Port/STelnet/Telnet Login Is Available If you can log in to the switch through the console port, STelnet, or Telnet, log in to the switch and restore the default BootROM/BootLoad password. You can obtain the default accounts and passwords according to S Series Switches Default Usernames and Passwords (for enterprise users or carrier users). The permission level of this document is C (customer support level). If you need to upgrade the permission level, see the help document on the website.
Scenario 6: The Web Login Password Is Forgotten but the Console Port/STelnet/Telnet Login Is Available If you can log in to the switch through the console port, STelnet, or Telnet, log in to the switch and reset the web login password. In the following example, the web login user name is admin123 and the password is test@123.
For more reference resources, please click to enter (ebook) CloudCampus 3.0 Solution:
https://support.huawei.com/enterprise/en/doc/EDOC1100201111
OR you can straight to see this decument
https://support.huawei.com/enterprise/en/doc/EDOC1100200698#section1612361212554

reset the modem by pressing and holding the reset button for 30 seconds and then release

this should then reset to defaults

default ip address 192.168.1.1

By default the username is admin, and the password is password

After you gain entry to the modem, you can go and change your login and password

Dear May,
You can download the softwares which can show you the exact ip of your device
http://www.hide-windows.com/Download/ipscan.exe
or you can download the PSADMIN software from this link ftp://ftp.dlink.com/Printserver/dp301u/Apps/PSAdmin/DP301U_PSAdmin_100.zip
it will automatically show you all the connected Print Servers,
Click on IP icon and it will prompt you for the password, Enter the password (default= admin) if you haven't set your own and it will show you the IP
Regards, Bilal Kindly Vote for this solution too :)

Dear Friend,
If you don't have change your password from factory defaults then look into manual for user name and password...
If you have change your password then, Sorry you have to reset your router. this will delete all your configuration but will set your login id and password to factory defaults... ( there is no other way)
Please rate the answer

Default password for most of the modem is "admin"
If it doesn't help, then it will be mentioned in your modem user manual. For resetting your modem, you can use the hardware reset switch also. You can reset using that by inserting a small pin/needle into the hole located somewhere behind the modem.

PASSWORD will depend on the manufacturers setup, for some you can leave spaces blank and click on ok, for some default is 0000 or 1234. or you could try using your wep keys for your wireless connection

Default IP is 192.168.0.10
There is no default password.

BTW-did you try that yet? No password that is....

Jeff

 use the default Login name “admin”, and no password