Mitel Inter-Tel 5000 - Topology Requirements; Computer Telephony Integration (CTI; Inter-Tel Audio and Web Conferencing; System Manager

Appendix B: Network IP Topology
Computer Telephony Integration (CTI)
Page B-6 Inter-Tel
®
5000 Installation Manual – Issue 2.4, May 2008
Computer Telephony Integration (CTI)
This section discusses computer telephony integration using the Open Architecture Interface
(OAI).
Inter-Tel Audio and Web Conferencing
Inter-Tel Audio and Web Conferencing runs on a standalone server to provide multiparty audio
conferences. It utilizes Inter-Tel Protocol (ITP), OAI, and RTP, to communicate with the Inter-Tel
CS-5200/5400/5600 as multiple Inter-Tel Protocol IP endpoints.
System Manager
Inter-Tel System Manager is a server-based application that centralizes management functions
for the Inter-Tel CS-5200/5400/5600 system along with various peripheral components, such as
Unified Communicator
®
, SIP Server, etc. For complete functionality, System Manager requires
significant connectivity to and from the managed devices. These requirements are outside the
scope of this appendix. They are described in the System Manager Installation and
Maintenance Manual, part no. 835.2743.
Topology Requirements
With regard to network topology discussed in this appendix, keep the following requirements in
mind:
• There is only one network interface for each Inter-Tel CS-5200/5400/5600 system.
• Inter-Tel Private Networking cannot operate through a NAT device.
• The communication between SIP endpoints and a SIP server must not pass through near-
end NAT, unless it is performed by a SIP-aware firewall. The same requirement exists for a
firewall performing far-end NAT.
• The communication between the Inter-Tel CS-5200/5400/5600 system, SIP Server, and
IWAC server must not pass through NAT.