Dear OTRS AG team,
your corporate signature states your phone numers in this format: +49 (0) 9421 56818 0
This has the huge disadvantage, that most VoIP solutions on corporate desktops don't recognise this as a dialable phone number.
If you want to be called from a corporate device, the caller needs to manualy delete either the zero or the +49 part.
Since most corporates uses internal numbers, I would prefere your numbers in the +49 9421 56818-0 format (as in DIN 5008).
Is it possible to adjust your corporate signatures? This will make calling you so much easier.