Fritz!Box remote SIP with different auth username

Posted on June 15th, 2016 by whinger. Filed under Uncategorized.

So I was given “username” and “auth username” parameters for my SIP trunking account, and it’s non-obvious where those values go in the fritz UI.

The answer, to save you the trouble of faffing with various possible options, is that the “username” goes in the “*Telephone Number for Registration” field at the top, while the auth username goes in the “Account Information” “User name” field. Make sure you check the “Use Internet telephone number for registration” checkbox too.

One Response to “Fritz!Box remote SIP with different auth username”

  1. JanP Says:

    I looked everywhere, nothing worked till I found the answer here, marvellous!

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