Now you can join all of your offices
together with NBX ConneXtions Gateway Servers. If you are an end-user
or an NBX Dealer, you can now get expert assistance and NBX H.323
Gateway Servers from the NBX HelpDesk. FULLY CONFIGURED and PLUG n' PLAY READY!!!
Rack Mountable - Preloaded - Fully Configured
- Plug n' Play Ready
HOW DOES IT WORK...
Since the NBX 100 and the Superstack
3 NBX V5000 supports the H.323 Standard, lets understand it a
The H.323 standard provides a
foundation for audio, video, and data communications across IP
based networks, including the Internet. By complying with H.323,
multimedia products and applications from different vendors can
interoperate, allowing users to communicate without concern for
An NBX ConneXtions H.323 Gateway
provides connections similar to tie lines between existing NBX
systems across an IP network. However, it can also support voice
connections between a 3Com NBX telephone and other H.323-compliant
ConneXtions H.323 Gateways support
- Extensions on other NBX systems
that have a ConneXtions gateway.
- Extensions on PBX systems that
have an attached H.323 gateway.
- H.323 gatekeepers
- Miscellaneous H.323-compliant
end-point devices such as:
- H.323 telephones
- Suitably equipped personal computers
- An emerging class of wireless
Overview of ConneXtions for
Your NBX Phone Systems
ConneXtions is a 3Com software
product that is installed on the NBX ConneXtions Gateway Server.
It can be purchased directly from us or from your local NBX dealer.
ConneXtions can support 2 to 100 voice conversations simultaneously
between your multiple offices, throughout the world.
Since our H.323 gateways implement
an ITU standard, it allows telephone-like call connections to
occur through an IP network. Although this standard addresses
the means for transferring data, voice, and images, the NBX ConneXtions
H.323 Gateway focuses on delivering low cost, high quality, voice
connections through IP networks.
The picture below shows a simplified
H.323 connection between two NBX systems. The end-to-end connection
is constructed from the coordinated use of Ethernet frames and
IP packets that work together to establish a voice connection
and then carry voice packets between NBX telephones.
H.323 calls between local and
remote NBX telephones are transparent to users, except for the
different (IP) dial plan. The NBX Network Call Processor (NCP)
sets up the local end of the H.323 call as though it were setting
up a call through a line card, however, this connection actually
goes to our NBX ConneXtions Gateway Server running the ConneXtions
The NBX NCP requests an H.323
port in the ConneXtions software by sending a frame, with a simulated
Ethernet address, that contains a requested IP address. The ConneXtions
gateway uses this address to request a level three connection
between the local router and the remote router associated with
another PBX or NBX system. After an IP connection has been established,
the ConneXtions software begins a series of H.323 exchanges by
using TCP packets on the IP connection.
These H.323 exchanges set up the
call and negotiate the type of voice compression that will be
used. They also cause the remote NBX (or PBX) system to begin
setting up the remote end of the connection.
To learn more about our NBX ConneXtions
Gateway Servers and how we can help implement this type of low
cost multi-office solution, please contact us toll free at (866)
NBX-HELP or register