User Manual

Message Routing and Migration
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Boomer II User Manual & Integrator’s Guide
Wavenet Technology 88 BM210012WT09
Message Routing and Migration
This section offers developers advice on how to migrate their
applications. That is, how to create new versions of their wireless
applications for porting to other DataTAC
®
systems. You can also use
this information to plan ahead for portability as you begin your initial
application development effort.
As the developer and user communities become more international in
scope, successful applications will be distinguished by their portability
across existing DataTAC networks. This is true whether you are
designing a new application or migrating an existing application to
other networks.
Message Routing
Three versions of DataTAC systems are in operation worldwide, as
noted by where they are currently implemented:
q DataTAC 4000 systems (North America)
q DataTAC 5000 systems (Asia-Pacific and Middle East)
q DataTAC 6000 systems (Europe)
The architectures of the three systems are basically alike. Although
they support different link layer protocols, the systems the systems
differ mainly in their message header syntax.
The distinction between host communications and peer-to-peer
messaging is also important. Separate DataTAC protocols support each
of these application models. The primary host communications mode is
Standard Context Routing (SCR), also known as fleet mode. Another
application mode is DataTAC Messaging (DM) , which handles
messaging among terminals (subscriber units).
SCR and DM are the common sets of rules that describe how to format
message headers on DataTAC systems. Although the header format
differs slightly among DataTAC 4000, 5000, and 6000 systems, the
functional concepts of operation are the same. The exact SCR and DM
syntax for each system is available in their separate Host Application
Programmer’s Manuals.
Other connection options are available for DataTAC 5000 and 6000
systems. Two of these are known as “personal shared” (Type I)
connections and “personal dedicated” (Type II) connections. These are
covered in the system host programming guides.
Note: In this section, “host” refers to the network fixed host.
“Terminal” refers to a subscriber device. In these guidelines a byte is
8 bits.