User Manual

DELTANODE FIBER DAS MANUAL
©DeltaNode Solutions 2012
20
Revision 12-03
2.1.7 RGW – the compact remote gateway
The RGW is a small unit similar to the BGW but intended for small systems where there is a low number
of remotes or where there is no head-end and therefore the RGW has a form factor that allows it to be
mounted inside a repeater casing.
This can be used to run up to 4 Remote Units from a single Repeater on a single Fiber. The RGW has the
capability to connect Northbound to a Central Gateway (CGW) just like the BGW does and it can also
forward alarms through a VPN tunnel to a CGW.
The memory capacity and features are reduced compared to the BGW but for a small system with a
single fiber this may be an option to use.
The RGW can be equipped with a modem to allow access to a system in a remote location where there is
no Ethernet. The modem is usually a 3G modem which enables the RGW to set up a tunnel to a Central
Gateway unit (CGW) enabling supervision, monitoring and control of the system
2.2 Remote Unit
There are many different kinds of remote units with a wide range of gain and output power to cater to
many different needs. A low and medium power unit can house up to 4 different frequency bands in one
unit, the high power versions can handle up to 2 different bands in one single unit.
Chassis types
RUs comes in mainly two different chassis, a single compact chassis for 1-2 bands
and a dual chassis for up to 4 bands. This is how they can be configured:
Chassis type
Low
Medium
High
Single chassis
1-2
1-2
1
Dual chassis
3-4
3-4
2
Table 10: Chassis types
It is also possible to have combinations of the above.
For example it is possible to build a dual chassis with
2 medium power bands and 1 high power band in
the same remote. Each side of a dual chassis is
virtually identical to a single chassis remote unit. This
ensures unparalleled flexibility when building
multiple operator / multiple band solutions.
A dual chassis may have 1-2 optical remote units
(FOR). This way they can be fed from different
directions for redundancy.
Because of the larger power amplifiers used for
high power RU:s the need for more cooling and
room allows only 2 bands in the same double chassis. Remotes can also be
daisy-chained by way of RF cables, meaning up to two chassis can share the same
fiber-optical interface providing up to 8 bands in a single location.
Figure 6: Single chassis remote
Figure 7: Dual chassis remote