There are two ways to make a phone call from MaX UC Communicator.

Method 1. With Accession Mobile Communicator open select Contacts.

Tap the contact you wish to call.                                                                                                                             From the contact view simply tap the number you wish to dial.

                                                                                                              

Method 2. With Accession Mobile Communicator open select Phone

And tap the dialer icon.                                                                                                                                            Dial the number and tap call icon.