Network Topologies; Point-To-Multipoint Star Network - Teledyne QMultiFlex-400 Installation And Operating Handbook

QMultiFlex-400™ Installation and Operating Handbook

7.1 Network Topologies

Star, mesh and hybrid star/mesh networks are all supported and can be combined as
required.
7.1.1

Point-to-Multipoint Star Network

A star network topology is shown in Figure 7-1.
In this scenario, a QMultiFlex-400™ generates a shared outbound from the hub to the
remotes, which have QFlex-400™ modems for receiving the outbound. They generate
return carriers back to the hub, which are demodulated by the QMultiFlex-400™. The box
count starts at literally one box at the hub and one at each site for the smallest network.
Traffic shaping is typically used to control the content of the shared outbound. VLAN
tagging is often used to keep traffic for each site separate.
The hub QMultiFlex-400™ can be configured to support remote-to-remote
communications, where relevant inbound traffic from one remote modem is retransmitted
in the shared outbound to one or more of the other remote modems.
The Q-NET™ control applications will normally be located at the hub where there is
connectivity to the whole network. If desired, operators can remotely access the system
from any location.
QFLEX-400
QFLEX-400
QMULTIFLEX-400
Figure 7-1 Q-NET™ Star Point-to-multipoint Network
Network devices such as routers, switches and VLAN switches can all be connected as
required. Multiple QMultiFlex-400™ devices, each supporting up to one modulator and up
to 16 demodulators, can be supported at the hub. All QMultiFlex-400™ devices can be
configured to share a single outbound carrier, if desired, through a system of cascading.
7-2