This
standard was written by many top engineers from many telecom companies around
the world, i.e. well reviewed and written.
This
document was well documented and structured.
A
section described the interaction of many telecom elements such as MSC, HLR,
and RBS. It was written at high level for an ease of understanding with enough
details. Thus readers didn’t get lost in details, but focused on the key features.
Each
feature is separated in a chapter, i.e. easy to search for an interested feature.
One
of the last section listed details of a protocol message with all parameters in
bit and byte. This was a good reference chapter.
If
you’re developing a system with a programming language similar to PLEX-C
of Ericsson, you could view a subsystem as an element in IS-41 Rev B such as
MSC or HLR. Therefore, you could build a dispatch
interface (similar to an API) for other subsystems to access internal functionality
of this subsystem. This would help to encapsulate this subsystem. If you optimize
this subsystem for some reasons, but remain the dispatch interface unchanged, other subsystems don’t need to be
updated.The goal to read this standard was to learn how to write a good document for a protocol application.
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