TP-Link TW-MR3220 User Manual page 33

Location / Mobile ISP – These two fields will display the location and the ISP you have

selected in the previous page. While you tick the below option Set the Dial Number and
APN manually, there will be no specific information in these two fields.
Set the Dial Number and APN manually - Tick the checkbox and then you are able to fill in

the Dial Number and APN blanks below, if your ISP is not listed in the Mobile ISP field in the
previous page.
Dial Number - Enter the Dial Number provided by your ISP.

APN - Enter the APN (Access Point Name) provided by your ISP.

Username/Password - Enter the User Name and Password provided by your ISP. These

fields are case-sensitive.
MTU Size - The default MTU (Maximum Transmission Unit) size is 1480 bytes, which is

usually fine. For some ISPs, you need modify the MTU. This should not be done unless
you are sure it is necessary for your ISP.
Use the following DNS Servers - If your ISP specify a DNS server IP address for you,

click the checkbox, and fill the Primary DNS and Secondary DNS blanks below. The
Secondary DNS is optional. Otherwise, the DNS servers will be assigned dynamically from
ISP.
Primary DNS - (Optional) Enter the DNS IP address in dotted-decimal notation provided by

your ISP.
Secondary DNS - (Optional) Enter another DNS IP address in dotted-decimal notation

provided by your ISP.
Click the Save button to save your settings.
TL-MR3220 3G/4G Wireless N Router User Guide
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