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How Messaging Works
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Messages are sent via a store-and-forward mechanism to a Short Message Service Centre
(SMSC), which will attempt to send the message to the recipient and possibly retry
if the user is not reachable at a given moment. Both Mobile Terminated (MT), for
messages sent to a mobile handset, and Mobile Originating (MO), for those that are
sent from the mobile handset, operations are supported. Message delivery is best
effort, so there are no guarantees that a message will actually be delivered to
its recipient and delay or complete loss of a message is not uncommon, particularly
when sending between networks. Users may choose to request delivery reports, which
can provide positive confirmation that the message has reached the intended recipient,
but notifications for failed deliveries are unreliable at best.
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Transmission of the short messages between SMSC and phone is via SS7 within the
standard GSM MAP framework. Messages are sent with the additional MAP operation
forward_short_message, whose payload length is limited by the constraints of the
signalling protocol to precisely 140 bytes. In practice, this translates to either
160 7-bit characters, 140 8-bit characters, or 70 2-byte characters in languages
such as Chinese, Korean, Japanese or Slavonic languages (e.g. Russian) when encoded
using 2-byte UTF-16 character encoding (see Unicode). This does not include routing
data and other metadata, which is additional to the payload size.
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Mobile Phone Shop Management Software
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Quicksoft, TrakIMEI is a full fledged Logistic Invoicing, Servicing and Accounting
and Inventory Management Software to accurately manage your inventory of mobile
phones with Unique tracking of phones by IMEI number.
more...
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