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 184.108.40.206, 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 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 transfert 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 24, 2020