Specifications

ESI Communications Servers Sales Overview
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Glossary
Codec — The device required to encode analog spoken voice into IP packets for transmission through a VoIP network.
The encoded voice is decoded at the receiving end, converting voice into an analog component.
HDD — Hard Disk Drive; the device on which the system’s operating software program, and voice mail prompts and
messages are stored.
IEEE — Institute of Electrical Engineers; the professional organization that establishes standards for, among others, the
telecommunications industry.
ICC — Inter-card communication; describes the method by which cards within a cabinet, as well as multiple card
cabinets, communicate with each other.
NSP — Network Services Processor; the ESI device, mounted on the Main Board, that provides for an Ethernet
connection between the ESI Communications Server and the customer’s local area network (LAN). Multiple applications
may run concurrently over the NSP connection, such as VIP and remote Internet programming.
PoE — Power over Ethernet; this IEEE standard (802.3af) defines the method of injecting power over a customer’s local
area network cabling infrastructure to operate TCP/IP devices at the Ethernet port. ESI uses this method, in conjunction
with a customer-provided power switch, to operate its PoE local IP Phones.
RF — Radio frequency.
RFID — Radio frequency identification.
RAID1 — Redundant array of independent drives.
VoIP — Voice over Internet Protocol.
About ESI
ESI (Estech Systems, Inc.) is a privately held corporation based in Plano, Texas. Founded in 1987, ESI specializes in business
communications systems. ESI pioneered the all-in-one telephone and voice mail system. The original IVX, introduced in 1996,
represented a radical breakthrough in system design: the inclusion of a full suite of features within a single integrated system.
Since its days as a small start-up, ESI has enjoyed exceptional stability and growth while maintaining its dedication to small-company
values — including the need to take care of the most important part of the equation: your business.
Copyright © 2009 ESI (Estech Systems, Inc.). IVX is a registered trademark of ESI. Other registered trade names mentioned herein are trademarks of their respective owners.
ESI phone systems are protected by various U.S. Patents, granted and pending. Product appearance, and other details and features described herein, are subject to change
without notice. Some features may not be available at initial release. More information on ESI and its products is available on the World Wide Web at www.esicomservers.com.