Digi TransPort WR21 - Page 230

Configuring network interfaces Configure mobile (cellular) interfaces
Digi TransPort® Routers User Guide
230
imsi.txt
Digi TransPort routers that support the automatic assignment of APNs use a text file, imsi.txt, to
determine APNs. The TransPort device compares the IMSI and ICCID values read from the modem
with the prefixes in the entries in imsi.txt, and will use the APN associated with the first match found
in imsi.txt to configure the APN for the selected SIM. If no match is found, the APN will be set to none.
The imsi.txt file may be periodically updated by Digi personnel, and can be updated as part of the
standard carrier firmware update procedures. For more information about updating your carrier
firmware, see Update carrier firmware. You can also edit the imsi.txt to include additional ICCID and
IMSI prefixes and corollary APNs. To edit the imsi.txt file:
1. Open the file in the File Editor (Administration > File Management > File Editor). See Manage
files for further information.
2. For the Filename field, select imsi.txt.
The file format used by the imsi.txt consists of three comma and space separated elements:
the ICCID Fragment, the IMSI fragment, and the APN:
3. Add additional ICCID and IMSI fragments and APNs as necessary, using this format.
Note If there are multiple occurrences of the same ICCIDand IMSI fragments, the device will
use the APN associated with first occurrence of the ICCID and IMSI fragments in the file.
4. Click Save file.