📦 Add-ons and Others
Special documentation and support for legacy and previous services.
Simple Line and SwitchBaord
- Managing Incoming and Outgoing Call Blocking
- How to call international numbers
- How to setup Simple Line Box - Grandstream HT701, HT702
- Troubleshooting "All Circuits Are Busy Now" Error on Outbound Call
- Troubleshooting "Device Not Registered" Error
- When will I be billed for international calling usage?