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- ESI-50 includes a built-in 482 port card, IVC hardware, and 3.0A power supply.
- 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
