Mobi PBX is a smartphone app allowing users of OneContactPBX to seamlessly make and receive calls using the company telephone system whilst out of the office.

Mobi PBX includes the following features:
- Make and receive phone calls on your own smartphone chargeable back to the office.
- Use worldwide in Wi-Fi areas and only be charged your normal landline call charges
- Link to your desk phone and allow calls to seamlessly overflow from one to the other
- Switch to GSM calls using your mobile SIM card in poor connection areas.
- View presence states of other users in your company worldwide
- Transfer, Mute, Hold and Conference facilities
- Sync your existing smartphone contacts with the built in address book.

The service requires login details provided by your OneContactPBX supplier.