KX-NS5111X    DSP Card 128 Channels for IP Solution or  Voice Message
For use with Panasonic PBX model KX-NS300BX
Enhance Voice Message (Auto Attendant) max. 62 Channel.  
Upgrade PBX for IP Solution : Require Activation Key model KX-NSF990 (Option)
      -Total use 128  Channles
     -Connect to SIP trunk, link to branches with VoIP Gateway
     -Use IP Phone/SIP Phone or Smart Phone  for extension numbers max capacity 128 IP  Extensions
 
Activation Key (License)  Lifetime   (Options)
KX-NSF990     
Activation Key for IP, with 4 IP Extension License
KX-NSM104X
4 Ch. IP Trunks (H.323/SIP) Activation Key (License)
KX-NSM501X
1 Ch. IP/SIP Activation Key(License)
KX-NSM510X
10 Ch. IP/SIP Activation Key(License)
KX-NSM701X   
1 Ch. SIP Ext. Activation Key(License for Third Party SIP)                     
KX-UCMA001W
1 Ch. Mobile Softphone  Ext. License  (Registered with KX-NSM501X)