TP-Link TD-8840 - Manual (Page 15)

TD-8840 External ADSL2+ Router User Guide
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Figure 3-4
You will then see the Figure 3-5, you will see some information such as link rate and so on.
Figure 3-5
User name and password is “admin”; if you want to change them, please go to “Management” Æ
“Access control”Æ“Passwords” changing them. (Figure 3-6)