Siemens C450IP: Firmware update not possible

When I tried to update the firmware of a Siemens C450IP, I always got the following error:

Firmware update not possible: Server not available!

This is a known problem with some Zyxel routers, the really simple workaround is to change with, then press SET and finally click on Update Firmware.

Tags: , ,

About author

Vittorio Pavesi


  1. Anonymous
    5:06 PM

    Do you have an email?

    Thank you

  2. Anonymous
    11:53 PM

    Gigaset S450 IP
    Firmware Update 12/2010 Version V02227:
    - New URL for provider profile and firmware update:
    - PSTN: Bugfix for calls using access code with 2 or 3 digits
    - VoIP: MWI notification for incoming calls is now VoIP account specific
    - VoIP: Improved early media support for outgoing wideband calls (handling of ALERTING)
    - Optimization for internal calls from a HDSP-ready handset to a standard handset
    - Display correct date for the last three days of the year.
    - Web Configurator (Settings/Telephony/Audio): The Codec list for is also
    displayed if no other VoIP accounts are configured.
    - Web Configurator (Status/Device): MAC identifier for auto-configuration is shown
    additionally to MAC address.
    - Interoperability with PBX 'Trixbox Pro' - bugfix for incoming calls
    - Australia: Daylight Saving Time corrected.

Post a Comment