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ESI-100 Server

The ESI-100 architecture allows expansion when required. The Base Cabinet and optional “piggybacking” Expansion Cabinet are wall-mountable and require very little space in your phone closet.

System highlights (maximum capacities shown)

CS 100Total stations - 84
IP stations - 72
Digital stations - 48
Analog stations - 28
Call-processing ports - 108
Central Office (CO) lines - 42
Digital line cards (T1/PRI) - 1
Voice mail ports - 8
Voice storage (hours) - Up to 140
Station/special-purpose mailboxes - 1,121
Conference ports (16 members/conference) - 16
Built-in automatic call distribution (ACD) - Yes
Shared-office tenanting (tenants) - 2
ESI Presence Management - Optional
VIP applications - Optional
Mirrored Memory Module (M3) backup - n/a

ESI CS 100 Brochure Adobe PDF Brochure



Plus other ESI Communications Server features:

  • Both digital and IP-based
  • Standards-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
  • ESI options
    • ESI Presence Management™
    • VIP™ family of applications
  • Optional IP-based features, including Esi-Link (combines up to 100 ESI systems into one)


Extensive phone options -

  • ESI Digital Feature Phone — 12-Key, 24-Key, 48-Key regular, and 48-Key TAPI.
  • ESI 48-Key IP Feature Phone II — Connects via LAN, WAN, or Internet; provides full ESI feature set via IP, either locally or at remote location; uses industry-standard G.711 and G.726 compression to reduce bandwidth requirements.
  • ESI Cordless Handset — Two sizes each of three models: Digital, [local] IP, and Remote IP; IP models allow Power over Ethernet (PoE) or AC power for your maximum convenience.
  • Standard analog sets

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