Router-Based Unrestricted Digital Internetworking Connectivity Solution (Rudics); Short-Burst Data (Sbd); Short Messaging Service (Sms) - Iridium SHOUT ns General Description Manual

and improve data throughput. In addition, the Apollo Emulator offers a feature called Smart
Connect TM , which manages airtime by seamlessly connecting and disconnecting a user
through the Iridium system. Airtime charges accumulate only while the call is connected.
Improved effective data throughput is achieved through the use of user-transparent data
compression. The channel rate is still 2.4 kbps. However, 10 kbps effective throughput can
be achieved depending on content (graphics and images will result in lower effective
throughput).
C.2.3 Router-based Unrestricted Digital Internetworking Connectivity Solution
(RUDICS)
RUDICS is an enhanced gateway termination and origination capability for circuit switched
data calls across the Iridium satellite network. When an Iridium modem places a call to the
RUDICS Server located at the Iridium Gateway, the RUDICS Server connects the call to a pre-
defined IP address allowing an end-to-end IP connection between the Host Application and
the Iridium modem. There are three key benefits of using RUDICS over the conventional PSTN
circuit switched data connectivity or mobile-to-mobile data solutions: (1) elimination of analog
modem training time, (2) increased call connection quality, reliability, and maximized
throughput and (3) protocol independence.
C.2.4 Short-Burst Data (SBD)
SBD is a simple and efficient bi-directional transport capability used to transfer messages
with sizes ranging from zero (a mailbox check) to 1960 bytes. SBD takes advantage of signals
within the existing air interface but without using the dedicated traffic channels. As a result,
small amounts of data can be transferred more efficiently than those associated with circuit-
switched data calls. Messages that originate from an Iridium modem can be delivered to a
variety of destinations. Commonly, data are delivered across terrestrial communications
networks (NIPRnet and Internet) to servers and applications that process data from one or
multiple fielded Iridium modems. SBD service also supports the transfer of messages to
Iridium modems, where messages may originate from terrestrial sources. Delivery methods
and options are initially configured when the Iridium modem is first purchased and may be
easily modified via web pages at a later time.
C.2.5 Short Messaging Service (SMS)
SMS is a mechanism to deliver short data messages over the Iridium satellite network to
the NIPRNet/Internet. Iridium SMS incorporates a subset of the GSM SMS features. Each SMS
message can be up to 160 text characters (7-bit coded) in length. The text characters are
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