Since firmware version 7.x TransPort routers with an LTE cellular module are using PDN 3 to establish an LTE connection. Certain providers and SIM cards, especially when using a private APN, will expect PDN 1 to be used or the router will fail to connect.
If your TransPort router is not establishing a cellular connection on LTE using a certain SIM card which is known working in another device, the below steps might help.
Since firmware version 220.127.116.11 (update to 18.104.22.168 or later as a first step), it is possible to instruct the router to use PDN 1 when a certain SIM card (or range) is detected. This is done by creating and uploading a file called "pdn.txt
" at the root directory of the router's file system.
- Locate the ICCID of the SIM card that requires PDN 1 to be used. This can be found either on the SIM card itself or from the Mobile page under Management - Network status > Interfaces > Mobile when the SIM is in the router, see the screenshot below:
- Create a text file named pdn.txt and enter the ICCID inside this file. The first Four/Five digits will suffice to allow a range.
- Using an S/FTP file transfer application, upload the file at the root directory of the router
- Reboot the router
After the reboot, the router will now be using PDN 1 everytime this particular SIM card (or matching this particular range) is detected.
Mar 25, 2020