ESI phone systems at a glance


IVX IP
IVX S-CLASS IVX E-CLASS IP E-CLASS
IVX
42s
IVX
42s
IVX
42s
IVX
72e
IVX
128e
IP
40e
IP
200e
Voice messaging
configuration
IAM 4-pt
VM
6-pt
VM
8-pt
VM
16-pt
VM
8-pt
VM
16-pt
VM

 Phones/systems compatibility
  See also phone comparison chart on this page

48-Key
Feature Phone
24-Key
Feature Phone
n/a n/a
12-Key
Feature Phone
n/a n/a
60-Key Console
support
IP phone
support
Opt. Opt.
Remote IP
Feature Phones
 — Opt. Opt. Opt. Opt.

 Features and options

Maximum call-
processing ports
42 42 42 72 126 70 198
Available
port card slots
2 2 2 4 7 2 10
Smallest config.
Lines x extensions
x analog ports
4x8
x2
4x8
x2
4x8
x2
6x12
x0
6x12
x0
3X28
x0
3X96
x0
Maximum
CO lines
12  12 12 42  66 30 66
Maximum
digital stations
24 24 24 48 84 28 96
Maximum
analog ports
6  6 6 16  28 6 30
Maximum
T1 channels
24 48 24 48
Maximum
PRI channels
—  23  46 24 48
Esi-Mail™
unified
messaging
support
Opt. Opt. Opt. Opt.
TAPI support Opt. Opt. Opt. Opt. Opt. Std. Std.
Esi-Link™
IP multi-site
support
Maximum
built-in user
mailboxes
 30 30 48  84 34 126
Built-in auto attendant
Maximum
automated
attendant
branches
18 18 100  100 100 100
Voice message
storage (hrs.)
0.5 2 30 70 280 70 280
Built-in voice
message channels
2 4 6 8  16 8 16
Guest/information
mailboxes
10 10 190 190 190 190
Automatic fax switching
Music/
message-
on-hold
recordings
4 5 5 8 8 8 8
SMDR (Station
Message Detail Recording)
Internal paging
External paging
interface
Built-in modem
Dedicated
serial ports
1  1 1 1  1 1 1
Programming
via PC, local
Programming
via PC, remote
Esi-Dex™
built-in directory
ACD (automatic
call distribution)
Verbal Help Guide™ — spoken help
Dedicated
VOICE MAIL key
(24-/48-Key
Phones)
Live call
recording
Live call
screening
On-hold dialing
Enhanced
Caller ID*
Personal
greeting
keys
Service
observing
911 alert
AutoPage  —
Cascade paging
mailboxes
Q & A
mailboxes
Goup
mailboxes
Off-premises
message
delivery
Off-premises
“reach me”
 
Message
Recycle Bin
Missed Call Key  —
Quick Groups™
Quick Move™
QuickPage™  —
Remote recording
of main greeting
 
Voice mail display
Visual hold
Virtual Answer Key
Virtual Mailbox Key

 Phone comparison chart

Phone
model
12-Key Digital 24-Key Digital 48-Key Digital 48-Key Digital TAPI 48-Key
IP
Remote IP 60-Key Console
Display
(lines • 
characters)
1 • 16 2 • 32 3 • 56 3 • 56 3 • 56 3 • 56 n/a
Programmable
feature keys
9 12 30 30 30 30 60
Fixed feature
keys
3 12 17 17 17 17 n/a
VOICE MAIL key ** n/a
Four-angle
tilt stand
Speaker n/a
Microphone (for
spkrphn. use)
 — n/a
Status
indicator
lamp
 — n/a