ESI 50 Business Phone System

Communication Server

The ESI-50 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)

Total stations – 52
IP stations – 12
Digital stations – 32
Analog stations – 8
Call-processing ports – 87
Central Office (CO) lines – 35
Digital line cards (T1/PRI) – 1
Voice mail ports – 6
Voice storage (hours) – Up to 60
Station/special-purpose mailboxes – 1,089
Conference ports (16 members/conference) – 16
Shared-office tenanting (tenants) – 2
ESI Presence Management – Optional
VIP applications – Optional
Mirrored Memory Module (M3) backup – Optional

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)