Specifications

3-40 CO/PBX Connections
Chapter 3 - System Installation
XTS-IP - Installation Manual December 2005
Voice Over the Internet Protocol Card (24-Port)
The Voice Over the Internet Protocol (VOIP24) card provides up to 24 lines per card. The
VOIP24 card allows bi-directional voice communication to other H.323 Revision 3 compatible
devices via an IP network such as an internal Local Area Network (LAN), the Internet, or a
Wide Area Network (WAN) using the Ethernet Interface. It also provides four-digit dialing.
The VoIP card uses Transmission Control Protocol / Internet Protocol (TCP/IP) for packet
delivery over an IP network. Additional standards and protocols are used to provide DTMF,
voice processing, and compression.
The VOIP24 card can accommodate a daughterboard module that is needed to realize the full
24-port capability of the VOIP24 card.
» Add-on Boards: Daughterboard
VoIP24 Station Port Capacity
 A maximum of 48 IP stations can be accommodated on the MPB1 system.
 A maximum of 96 IP stations can be accommodated on the MPB2/MPBE systems.
 Cabinets 0, 1, and 2 can be used in MPB2/MPBE systems. Cabinet 3 can also be used in
MPBE systems.
 A maximum of 3 VoIP24 cards can be installed per cabinet.
 A maximum of 3 VoIP24 cards can be installed per MPB1 system.
 A maximum of 9 VoIP24 cards can be installed per MPB2/MPBE system.
 The VoIP24 base card (12 ports) can accommodate 24 IP stations in a blocking
arrangement.
 The VoIP24 card with Daughterboard can accommodate 24 IP stations (non-blocking).
Cannot accommodate a 2 to 1 ratio.
Blocking = A user goes off-hook and may not receive dialtone if no IP resources are available
(busy).
Non-blocking = A user has a dedicated IP channel at all times. No busy condition.
* Blocking is not applicable to VoIP24 w/daughterboard
When VoIP/VoIP24 cards are used to support IP Phones, it is recommended that you install
cards in Cabinet 0. If additional cards are required, use Cabinet 3 and then Cabinets 1 & 2. This
is to maximize speed and efficiency.
Blocking
MPB1 MPB2 MPBE
Cards Stations Cards Stations Cards Stations
VoIP24 base card 248496496
VoIP24 w/daughterboard* -- -- -- -- -- --
Non-Blocking
MPB1 MPB2 MPBE
Cards Stations Cards Stations Cards Stations
VoIP24 base card 224672672
VoIP24 w/daughterboard 2 48 4 96 4 96