SIP trunk phone connections
Up to 200 parallel calls
Phone number without monthly costs
Up to 1 year free test period*
Hosted PBX with numerous features
Easy and intuitive handling
Extensions from 60 cent/month*
Internet & phone for businesses
VDSL connections with up to 100 Mbps
SIP trunk telephone connections
Integrated Cloud PBX on demand
- SIP trunks
- Cloud Telefonanlage (Cloud PBX)
- Business DSL solutions
My VoIP-Client can't get registered. I can't call anymore. What can I do now?
Please check, if you've got an internet connection and if your log in information for VoIP are correct. Please check settings of your terminal as well. You can find you login information at our customer portal. Click here for guidances of several devices.