Specifications

ESI Communications Servers Product Overview
9
Capacity constraints
An ESI Communications Server’s full station capacity
can be reached either (a.) with all extensions installed
as IP stations or (b.) when a minimum number of the
installed stations are IP instruments (as shown in the
following table).
Config. for
full capacity
ESI-
1000
ESI-
600
ESI-
200
ESI-
100
ESI-
50
Card slots used
42
of 42
26
of 28
13
of 14
4
of 4
5
of 5
1
IVCs 29 14 6 3 1
2
Digital/analog
cards
13 12 7 1
3 plus
1 built-in
Minimum
IP stations
696 336 144 72 12
Other stations 120 72 48 12 40
The IVC supports ESI’s Power Over Ethernet (PoE)
IP Phones installed locally or remotely, in any combination.
If any IVC fails, only the IP stations assigned to that
card will go off-line.
Esi-Link private IP
networking capabilities
The Esi-Link IVC is reserved for the support of either
eight or 24 Esi-Link channels. With the Esi-Link IP
networking option, up to 100 individual sites may be
connected together via a customer’s WAN
2
or the Internet.
The following table shows how many Esi-Link IVCs may
be installed in each ESI Communications Server, and
the resulting number of possible, simultaneous VoIP
connections between systems:
Maximums
ESI-
1000
ESI-
600
ESI-
200
ESI-
100
ESI-
50
Esi-Link
IVCs
4 2 1 1 1
3
Inter-system
VoIP conns.
96 48 24 24 8
For further details, see the Esi-Link Product Overview
(ESI document #0450-0214). ESI-trained Resellers
may download this document from
www.esiresellers.com/docs (password required).
1
One 482 card and one IVC are built into the ESI-50.
2
Wide area network.
3
This single built-in IVC supports both local and remote IP channels.
With the maximum of eight Esi-Link channels in use, only four local
channels are available for use.
IP station sets
An ESI Communications Server supports several types
of IP telephones:
• The 48-Key IP Feature Phone II (available with
backlit display) can be installed in-house on the
customer’s network, or remotely wherever a
broadband connection to the Internet is available.
There is a two-port Ethernet switch built into the IP
Feature Phone II. This provides a single Ethernet
connection to the network for both the customer’s IP
Phone and his office computer. Support for Quality
of Service (see “Quality of Service (QoS) support,”
page 10) is critical in this type of installation, to
ensure that there is no loss of audio or dropped
voice packets during large data downloads.
The phone includes built-in Power over Ethernet
(PoE) capabilities for those customers whose LAN
employs powered switches. In cases where the
customer does not have PoE switches installed, the
optional 48VDC adapter is used to provide operating
power to the phone.
When connected to an ESI Communications Server,
the 48-Key IP Feature Phone II can optionally utilize
DHCP to obtain an IP address from the customer’s
LAN. If the customer’s LAN does not support DHCP,
a static IP address will automatically be assigned by
the system.
The 48-Key IP Feature Phone II may also be
installed outside the confines of the customer’s LAN.
When installed remotely, the phone uses the higher
compression rate of G.726 to maximize voice quality.
A remote location might include a remote facility,
home office, or any other location where broadband
Internet access is available. Remote IP users are
connected directly to the system, and operate as if
they were on-premises.
• The ESI Local IP Cordless Handset
4
provides
connection of the customer’s LAN to the phone’s
base station. Users of Local IP Cordless Handsets
are free to move throughout their facility while
staying in touch with customers and co-workers.
• For remote teleworkers, ESI also offers the
Remote IP Cordless Handset.
4
This phone
connects like a “wired” Remote IP Phone, and can
be installed anywhere broadband Internet access is
available. The teleworker’s home phone line can be
connected into the Remote IP Cordless Handset’s
base station.
• The optional VIP Softphone combines the
functionality of a 48-Key IP Feature Phone II and the
VIP Professional product in one PC-based phone.
For more information about this product,
see also “Optional VIP PC applications,” beginning
on page 7, as well as the VIP Product Overview
(ESI # 0450-0608).
4
See the ESI Cordless Handsets Product Overview (ESI # 0450-0840).