COSMOTE Fax Problem

[ATH789]

Dear all,
anyone a idea why i can not send faxes over my Cosmote Number with a external Fax Machine connected with FritzBox 7590?

I always get the following Error:
488 Not Acceptable Here

If i have the Outgoing Fax Number from Cosmote to Yuboto it works well, but with Cosmote not.


Thank you

[xaris2335]

If the message "Not Acceptable Here (488 or 606)" is displayed, your provider does not support the T.38 standard. Without T.38, reliable fax transmission over the internet is not possible, you can look at the official site for further informations.
I am not an advanced user for this error but you can wait for others more advanced to reply, to double check the sollution of your problem.
welcome to the forum.