Panasonic KX-NSUN100WNormal User Activation Key (100 Users)Enables 100 Users with Main Device (NT / DT / HDV / SLT / TCA / IP Softphone / any other SIP device)..
Panasonic KX-NSUN500WNormal User Activation Key (500 Users)Enables 500 Users with Main Device (NT / DT / HDV / SLT / TCA / IP Softphone / any other SIP device)..