VOIP TELEKOM MAGENTA Fax mit Cisco SPA112 einrichten

genau so habe ich es auch gemacht.

allerdings so eingestellt.

Zitat

Fax is an old technology but is still used by many businesses. Configuring your Cisco SPA112 or SPA122 with the settings listed below will help ensure the best possible result when faxing over VoIP.

1. Select Voice in the Menu Bar, and then select either Line 1 or Line 2 depending on which line you have used for your fax, In the Network Settings section, enter the following settings:
   
   • Network Jitter Level: very high
   • Jitter Buffer Adjustment: no
2. Next, in the Supplementary Service Subscription section, enter the following settings:
   
   • Call Waiting Serv: no
   • Three Way Call Serv: no
3. Now, in the Audio Configuration section, enter the following settings to support T.38 fax:
   
   • Preferred Codec: G711u (USA) or G711a (rest of the world)
   • Use Pref Codec Only: yes
   • Silence Supp Enable: no
   • Echo Canc Enable: no
   • FAX Passthru Codec: G711u (USA) or G711a (rest of the world)
   • FAX Passthru method: ReINVITE
   • FAX Enable T38: yes
   • FAX T38 ECM Enable: yes
   • Fax Tone Detect Mode: Callee only
4. Click Submit to save your settings.
5. Verify that your fax machine BAUD rate is set to a speed between 7200 and 14400. I suggest 9600.

quelle : https://www.ukvoipforums.com/viewtopic.php?t=914

Hat bei mir auf anhieb geklappt.