GE MDS TransNEXT NET9L Technical Manual page 13

Point-to-Point System
A point-to-point configuration is a simple arrangement consisting of just two radios—a Master and a
Remote. This provides a half-duplex communications link for the transfer of data between two locations.
Adding a Tail-End Link to an Existing Network
A tail-end link can be used to extend the range of a traditional (licensed) MAS system. This might be
required if an outlying site is blocked from the MAS Master station by a natural or man-made obstruction.
In this arrangement, a TransNEXT radio links the outlying Remote site into the rest of a licensed MAS
system by sending data from that site to an associated TransNEXT installed at one of the licensed Remote
sites.
As the data from the outlying site is received at the licensed Remote site, it is transferred to the licensed
radio (via a local cable connection) and is then transmitted to the MAS Master station in the usual
manner.
Extending a TransNEXT Network with a Network Repeater
Similar to a Tail-End Link, Store-and-Forward (SAF) offers a way to physically extend the network
range, but in a simple and economical manner. SAF works by dividing a network into a vertical hierarchy
of two or more sub-networks. Extension radios (designated in TransNEXT as radio.mode "x") serve as
single-radio repeaters that link adjacent sub-networks, and move data from one sub-network to the next
one.
Interworking with a TransNET network
Each of the application types above can be supported by introducing a TransNEXT radio into an existing
TransNET network, replacing older radios or extending communication and new features to new sites.
Figure 2-1. Mixed TransNEXT & TransNEXT Application
MDS 05-7280A01, Rev. A MDS TransNEXT Technical Manual 13