The ESI CS 100 KSU is newest version of the E class.
It can expand to 24 lines and 48 Digital telephones.
Cards that can be used with it are.
E2 612, E2 684, E2 D12, IVC 24 and the E2 A12 cards.
The system comes with motherboard and power supply and can add the above cards from our store.
Telephones that work on it are.
ESI 48 key HDFP,24 Key DFP and the 60D.