Marcus Gustafssons exjobb
Mjukvarumodem på begränsad hårdvara
Sammanfattning (abstract)
In a deregulated telecom market telecom aggregators have become more
common. They use call routers to route their customers' calls with
the cheapest carrier. The call router has to get updated routing
information to be able to do least cost routing. With more advanced
call routers more data has to be transferred during updates. This
requires that a new faster method will be developed for data transfer
to call routers via the PSTN instead of the old methods using DTMF
tones.
This report shows how to design a software modem in a call router
without adding extra hardware. Many design decisions has to consider
the reduced amount of memory and low computational power available
in the micro processor that controls the call router.
Hela rapporten
Rapporten finns både i pdf och i postscript.
Marcus
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