Loaded with advanced capabilities yet amazingly easy to use, ESIís patented IVX S-Class (IVX 42s) All-In-One Digital Phone Systems give your small to medium-sized business the power to present your most professional side to your customers.

Big features; big capacities
Each IVX S-Class phone system combines multiple first-rate, feature-rich systems into one tightly integrated unit:

  • Business phone system
  • Voice messaging choices:
    either full-featured voice mail/automated attendant 
    or
    ESIís Integrated Answering Machine
  • Messages-on-hold
  • Enhanced Caller ID
12-Key Digital Feature Phone (ESI)
 
24-Key Digital Feature Phone (ESI)
 
The 12-Key Digital Feature Phone is designed for occasional users and for areas such as lobbies, warehouses and waiting rooms. The 24-Key Digital Feature Phone is perfect for users who need access to all IVX C-Class system features.
48-Key Feature Phone (ESI)
 
An ESI 48-Key Feature Phone is ideal for most active phone users.
 
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