A5 Standard Edition 5 users 1 line access B5 Standard Edition 10 users 1 line access C5 Standard Edition 20 users 1 line access H5 Professional Edition 100 users 1 line access T5 Professional Edition 100 users 1 line access T5 Professional Edition 100 users 1 Line access T5 Professional Edition 100 users 1 Line access T5 Professional Edition 100 users 1 Line access T5 Professional Edition