There are much more differents between the systems. At first, there are 3 Systems of the Hicom 300 -Family.
Hicom 300 (16 Subscribers on board, no licensing)
Hicom 300 E (24-subscribers on board - most 16-boars will run, licensing)
HiPath 4000 (like 300 E, but new boxes for rack-mounting, new licensing-concept, VoIP-boards, HTML-Assistant for administration)
Not so lararge ar the steps in the small series:
Hicom 150 E
HiPath 3000 (the same like 150, only from version to version more features and special boxes for rack-mounting. The actual version is the 5.0 an the 3700 and the 3750 use the same boxes like 4000 rack-boxes)
From step to step there are more features on every system, so you need to look on the Software-version of an axisting system and a destination system to know the differences. For example Hipath 4000 V 2.0 hase the LargeEnterpriseGatekeeper an a new call-diversion-concept.
The HiPath 4000 can use a distributet hardware via TCP/IP by using IPDA-boxes. In the Version 2.0 the IPDA-boxes can equipped with a emergency-processor and the box will run as a own system if the IP-connection crashes.
You see, I can write line by line and will not find a end.
Bye
Niels