BT ZyXEL Prestige 700 Series Firmware Upgrade

***IMPORTANT NOTE: This applies to the 793H only if the router fails to synchronize with correct cabling on installation. Please downlaod the following and follow the read me file 340RQ5_20100306***

***IMPORTANT NOTE: This applies only to the 791R only, all 792's should ship with the latest firmware. However should you require it please download it here P-792H_3.40(BZ.3)C0***

Before you upgrade the firmware on the router, please check the current firmware version in use on the router. This can be checked as follows:

Web interface: Main Menu -> Maintenance -> System Status. The ‘System Status’ box at the top will list the ZyNOS F/W Version.

Telnet / Hyperterminal interface: Main Menu -> 24 (System Maintenance) -> 2 (System Information and Console Port speed) -> 1 (System Information). Here, the ZyNOS F/W Version is shown.

Possible firmware versions you may have:

  1. V3.40(BT.4) – this is the latest version of the firmware, no upgrade is required.

  2. V3.40(BT.3) – this firmware should be updated by simply uploading the firmware file via the web interface or via FTP – see the “Upgrading BT.3 to BT.4” section below.

  3. V3.40(BT.2) - this firmware cannot be upgraded as easily due to its age – Zyxel recommend that it should be upgraded to BT.3 using an upgrade application, and then upgraded to BT.4 as a separate step. See the “Upgrading BT.2 to BT.3” section below.

  4. V3.40(BT.Y) or (BY.0) – this firmware (from 2004) cannot be upgraded as easily due to its age – Zyxel recommend that it should be upgraded to BT.3 using an upgrade application, and then upgraded to BT.4 as a separate step. See the “Upgrading BT.Y to BT.3” section below.


Upgrading BT.3 to BT.4


BT_Zyxel_Firmware_Upgrade (BT.4).zip

Please pay particular attention to the "Read this first" document included as it contains important instructions which must be followed in order for the upgrade to complete successfully.

Upgrading BT.2 to BT.3

Upgrading to BT.3 from BT.2 has to be carried our using a special upgrade application used via the router's ethernet interface.

BT_Zyxel_Firmware_Upgrade (BT.2).zip

Please pay particular attention to the "Read this first" document included as it contains important instructions which must be followed in order for the upgrade to complete successfully.

Please note that once you have upgrading to BT.3 you can then upgrade to BT.4 by following the “Upgrading BT.3 to BT.4” section above.

Upgrading BT.Y or BY.0 to BT.3

Upgrading to BT.3 from BT.Y or BY.0 has to be carried out using a special upgrade application used via the router’s serial interface .

BT_Zyxel_Firmware_Upgrade (BT.3).zip

Please pay particular attention to the "Read this first" document included as it contains important instructions which must be followed in order for the upgrade to complete successfully.

Please note that once you have upgrading to BT.3 you can then upgrade to BT.4 by following the “Upgrading BT.3 to BT.4” section above.

Note: When successfully completed, the version of the firmware displayed within the 'System Status' screen of the ZyXEL Router (Main Menu -> Maintenance), will show as ZyNOS F/W Version: V3.40(BT.4) | 9/9/2005