User Manual

DELTANODE FIBER DAS MANUAL
©DeltaNode Solutions 2012
8
Revision 12-03
2 System Description
The Fiber-DAS system consists of two major parts. This is the Master Unit (MU) and one or more Remote
Units (RU) connected to the Master Unit via optical fibers. Each Remot Unit needs to be connected to a
fiber, but up to four RU:s can share a single fiber link using optical splitters.
2.1 Master Unit
The Master Unit consists of a 19 inch frame rack with modules that are selected depending on the
system design. Generally all Master Units contains a power supply, at least one Base Station Interface
Unit (BIU), an RF splitter/combiner unit called the Point of Interconnect (POI) and minimum one Fiber-
Optic Interface card (FOI).
The master unit will also contain a network switch for connecting the communications paths between
the modules together and also some kind of gateway, either the Remote Gateway Unit (RGW) or the
Base Station Gateway Unit (BGW). The RGW is a smaller compact embedded solution while the BGW is a
full featured Linux server that can be set up in many different ways.
The master unit will assign IP addresses to all the subunits in the rack and also for the Remote Units
when they are connected to the system via the build in DHCP server present in the RGW and BGW
modules. This is will configure itself automatically and create a protected sub-net for the system itself
that should not be connected directly to a LAN.
For supervision by remote a gateway of the type RGW or BGW is installed. This acts as a firewall and will
make sure that the internal traffic in the system stays internal and that the web interface for monitoring
and supervision as well as SNMP trap forward is handled as expected.
Each of the modules will be described in the following sections.