308 DS DR5 Norstar KSU

This Norstar KSU is a 3 line, 8 station PBX designed for smaller business operations that need a system for optimal functioning, but  do not need expandability that come with bigger system. These businesses usually are need of phone system features, such as paging and transfer, but do not need  something too large. It supports all Norstar and Business Series telephones, including fully featured digital functions with LCD and soft keys. It's also  easy to add the options that your business needs, including Norstar  applications, automated attendant, analog terminal adapters, and station message  detail recording (SMDR).

Additional Facts:
Up to 3 lines and 8 telephone extensions.
Voicemail and automated attendant support.
Supports all Norstar and Business Series phones.
Simplifies communications and prevents dropped and abandoned calls.
LCD window delivers step-by-step instructions.

616 DS DR5 Norstar KSU

This Norstar KSU is a 6 line, 16 station PBX designed  for smaller companies that need more than 3 lines but not more than 6 and/or need more than 8 stations but not more than 16. These companies or divisions of companies usually expect no future expansion of their phone system beyond the  capacity of the 616