Got these setting from Telkom support: Saying this is for Pretoria area code. Registration still fails
View attachment 1525131
I no longer have my Telkom voip account, but my A510IP gigaset does not have the length limitation that your unit appears to have. I managed to save a longer authentication name value without any problems:
May I suggest that you check whether there are firmware updates available for your gigaset. You check this by going to Settings -> Management -> Firmware upgrade and clicking the 'Upgrade Firmware' button. The upgrade process will run automatically and result in a restart of the base station. Do not disconnect the power while the upgrade is taking place and allow it a few minutes to complete. The base station might be inaccessible for a few minutes during the upgrade. Check your loadshedding schedule before initiating the process to avoid problems.
Referring to Post #32, there used to be a section on the Telkom website that showed your account status as registered. I assume that this is required before the account will work. Please confirm that status by logging into the Telkom website.
Telkom IP Voice Service
For everyone with a Fanvil phone (bought the phone (X3SP) to play around with VOIP and decided to stick with it), update to the latest software first. Then make sure your phone is provisioned on the Telkom network. It should work thereafter.
mybroadband.co.za
Other steps that you could try is to disable the account on the Gigaset and try to set it up on a cellphone to confirm that it is working. You could try an app like Zoiper which is free.