Panasonic KX-NSA910W Communication Assistant QSIG Network Plug-In - 10 UsersCommunication Assistance QSIG Network Plug-In 10-UsersLicense Valid only for Phone System Bought in USA.To install this license you should to contact a panasonic Technician Certified in your phone system ..
Panasonic KX-NSA940W Communication Assistant QSIG Network Plug-In - 40 UsersCommunication Assistance QSIG Network Plug-In 40-UsersLicense Valid only for Phone System Bought in USA.To install this license you should to contact a panasonic Technician Certified in your phone system ..
Panasonic KX-NSA949W Communication Assistant QSIG Network Plug-In - 128 UsersCommunication Assistance QSIG Network Plug-In 128-UsersLicense Valid only for Phone System Bought in USA.To install this license you should to contact a panasonic Technician Certified in your phone syste..