- ESI-50 includes a built-in 482 port card and IVC hardware
- One expansion slot for another 482 card. Simply activate the IVC to add IP phones and/or Esi-Link licenses.
- Both digital and IP-based
- Standard-based design (including SIP support)
- ESI's Verbal User Guide™
- Six-level,100-branch automated attendant
- Automatic call distribution (ACD)
- ESI phones
- Desktop and cordless models
- Digital and IP
- Some models available with backlit displays
- Optional IP-based features, including Esi-Link
- One Year Warranty