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	<title>Mobile Tidings &#187; PDU</title>
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		<title>Setting Voicemail Waiting Indication via SMS</title>
		<link>http://mobiletidings.com/2009/07/08/voicemail-waiting-indication-sms/</link>
		<comments>http://mobiletidings.com/2009/07/08/voicemail-waiting-indication-sms/#comments</comments>
		<pubDate>Thu, 09 Jul 2009 04:41:21 +0000</pubDate>
		<dc:creator>Jeroen</dc:creator>
				<category><![CDATA[SMS]]></category>
		<category><![CDATA[MWI]]></category>
		<category><![CDATA[PDU]]></category>

		<guid isPermaLink="false">http://mobiletidings.com/?p=318</guid>
		<description><![CDATA[As shown in an , the Data Coding Scheme (DCS) octet in the SMS PDU can be used to turn a regular text message into a flash message. Another feature of SMS that is enabled through use of the DCS is the Message Waiting Indication: When someone leaves you a voicemail, the voicemail system communicates [...]]]></description>
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		<slash:comments>8</slash:comments>
	
		<series:name><![CDATA[Sending out an SMS]]></series:name>
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		<title>References</title>
		<link>http://mobiletidings.com/2009/07/08/references/</link>
		<comments>http://mobiletidings.com/2009/07/08/references/#comments</comments>
		<pubDate>Wed, 08 Jul 2009 21:48:36 +0000</pubDate>
		<dc:creator>Jeroen</dc:creator>
				<category><![CDATA[SMS]]></category>
		<category><![CDATA[UAProf]]></category>
		<category><![CDATA[GSM-7]]></category>
		<category><![CDATA[PDU]]></category>

		<guid isPermaLink="false">http://mobiletidings.com/?p=315</guid>
		<description><![CDATA[I have added a page with references to the official 3GPP, Open Mobile Alliance (formerly WAP Forum) and other specifications that are relevant for the topics in this blog so far. See . I&#8217;ll keep that page up-to-date.]]></description>
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		<slash:comments>2</slash:comments>
	
		<series:name><![CDATA[Sending out an SMS]]></series:name>
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		<item>
		<title>How to pack GSM-7 characters into septets</title>
		<link>http://mobiletidings.com/2009/07/06/how-to-pack-gsm7-into-septets/</link>
		<comments>http://mobiletidings.com/2009/07/06/how-to-pack-gsm7-into-septets/#comments</comments>
		<pubDate>Mon, 06 Jul 2009 23:01:07 +0000</pubDate>
		<dc:creator>Jeroen</dc:creator>
				<category><![CDATA[SMS]]></category>
		<category><![CDATA[GSM-7]]></category>
		<category><![CDATA[PDU]]></category>

		<guid isPermaLink="false">http://mobiletidings.com/?p=289</guid>
		<description><![CDATA[Once we have our text in the GSM-7 character set, we’re ready to write the septets. As is show , the mapping is kind of awkward, see 3GPP TS 23.038. Here is the algorithm I use to achieve this: /* GSM-7 packing routing. Written by Jeroen @ Mobile Tidings (http://mobiletidings.com) */ int /* Returns -1 [...]]]></description>
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		<slash:comments>28</slash:comments>
	
		<series:name><![CDATA[Sending out an SMS]]></series:name>
	</item>
		<item>
		<title>GSM-7 Encoding with the GNU iconv library</title>
		<link>http://mobiletidings.com/2009/07/06/gsm-7-encoding-gnu-libiconv/</link>
		<comments>http://mobiletidings.com/2009/07/06/gsm-7-encoding-gnu-libiconv/#comments</comments>
		<pubDate>Mon, 06 Jul 2009 21:54:49 +0000</pubDate>
		<dc:creator>Jeroen</dc:creator>
				<category><![CDATA[SMS]]></category>
		<category><![CDATA[GSM-7]]></category>
		<category><![CDATA[PDU]]></category>

		<guid isPermaLink="false">http://mobiletidings.com/?p=279</guid>
		<description><![CDATA[To produce the GSM-7 encoded text that is needed for SMS text messages sent with a GSM modem in PDU mode we need 2 steps. First we need to convert our text to the GSM-7 character set. The GSM-7 character set is described in 3GPP TS 23.038. I’ve always been a fan of the GNU [...]]]></description>
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		<slash:comments>13</slash:comments>
	
		<series:name><![CDATA[Sending out an SMS]]></series:name>
	</item>
		<item>
		<title>Combining SMS messages</title>
		<link>http://mobiletidings.com/2009/02/18/combining-sms-messages/</link>
		<comments>http://mobiletidings.com/2009/02/18/combining-sms-messages/#comments</comments>
		<pubDate>Wed, 18 Feb 2009 23:07:56 +0000</pubDate>
		<dc:creator>Jeroen</dc:creator>
				<category><![CDATA[SMS]]></category>
		<category><![CDATA[EMS]]></category>
		<category><![CDATA[PDU]]></category>

		<guid isPermaLink="false">http://mobiletidings.com/?p=139</guid>
		<description><![CDATA[As discussed in a previous post, many features of SMS messages become available if you can set the User Data Header (UDH) field. When using a GSM modem in text mode you can’t sent a UDH, so you need to use PDU mode. How do you add a UDH? There are 2 things you need [...]]]></description>
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		<slash:comments>91</slash:comments>
	
		<series:name><![CDATA[Sending out an SMS]]></series:name>
	</item>
		<item>
		<title>What are EMS messages?</title>
		<link>http://mobiletidings.com/2009/02/13/what-are-ems-messages/</link>
		<comments>http://mobiletidings.com/2009/02/13/what-are-ems-messages/#comments</comments>
		<pubDate>Fri, 13 Feb 2009 17:25:00 +0000</pubDate>
		<dc:creator>Jeroen</dc:creator>
				<category><![CDATA[SMS]]></category>
		<category><![CDATA[EMS]]></category>
		<category><![CDATA[GSM]]></category>
		<category><![CDATA[PDU]]></category>

		<guid isPermaLink="false">http://mobiletidings.com/?p=129</guid>
		<description><![CDATA[EMS stands for Enhance Message Services. EMS messages are just SMS messages with a twist. EMS messages make use of the User Data Header to add some meta data to the SMS message being sent. This meta data is separate from the actual text and devices that don’t understand some or any of the EMS [...]]]></description>
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		<slash:comments>19</slash:comments>
	
		<series:name><![CDATA[Sending out an SMS]]></series:name>
	</item>
		<item>
		<title>Sending a flash SMS message</title>
		<link>http://mobiletidings.com/2009/02/12/sending-a-flash-sms-message/</link>
		<comments>http://mobiletidings.com/2009/02/12/sending-a-flash-sms-message/#comments</comments>
		<pubDate>Thu, 12 Feb 2009 21:00:10 +0000</pubDate>
		<dc:creator>Jeroen</dc:creator>
				<category><![CDATA[SMS]]></category>
		<category><![CDATA[GSM]]></category>
		<category><![CDATA[PDU]]></category>

		<guid isPermaLink="false">http://mobiletidings.com/?p=114</guid>
		<description><![CDATA[So far I’ve show how to send a text message in PDU mode. There is nothing special about this. There are a number of things you can do in PDU mode, that you can’t do in text mode. A first example is a flash SMS message. A flash SMS message is an SMS message that, [...]]]></description>
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		<slash:comments>17</slash:comments>
	
		<series:name><![CDATA[Sending out an SMS]]></series:name>
	</item>
		<item>
		<title>More on the SMS PDU</title>
		<link>http://mobiletidings.com/2009/02/11/more-on-the-sms-pdu/</link>
		<comments>http://mobiletidings.com/2009/02/11/more-on-the-sms-pdu/#comments</comments>
		<pubDate>Thu, 12 Feb 2009 01:14:18 +0000</pubDate>
		<dc:creator>Jeroen</dc:creator>
				<category><![CDATA[SMS]]></category>
		<category><![CDATA[GSM]]></category>
		<category><![CDATA[PDU]]></category>

		<guid isPermaLink="false">http://mobiletidings.com/?p=102</guid>
		<description><![CDATA[As discussed in an , you can connect to a GSM modem and use AT commands to send SMS messages. There are 2 possible methods: text mode and PDU mode. It turns out that most devices support PDU mode, but only a few support text mode. Here is an example AT command to submit a [...]]]></description>
		<wfw:commentRss>http://mobiletidings.com/2009/02/11/more-on-the-sms-pdu/feed/</wfw:commentRss>
		<slash:comments>80</slash:comments>
	
		<series:name><![CDATA[Sending out an SMS]]></series:name>
	</item>
		<item>
		<title>Sending out an SMS in PDU mode</title>
		<link>http://mobiletidings.com/2009/01/12/sending-out-an-sms-in-pdu-mode/</link>
		<comments>http://mobiletidings.com/2009/01/12/sending-out-an-sms-in-pdu-mode/#comments</comments>
		<pubDate>Mon, 12 Jan 2009 23:58:33 +0000</pubDate>
		<dc:creator>Jeroen</dc:creator>
				<category><![CDATA[SMS]]></category>
		<category><![CDATA[EMS]]></category>
		<category><![CDATA[GSM]]></category>
		<category><![CDATA[Modem]]></category>
		<category><![CDATA[PDU]]></category>

		<guid isPermaLink="false">http://mobiletidings.com/2009/01/12/sending-out-an-sms-in-pdu-mode/</guid>
		<description><![CDATA[PDU mode is a lot more interesting than text mode. There are all kinds of things that can be done with SMS messages, all leveraging special formatting that is only available if you use PDU mode: Send messages Send a Configure the phone Send Send a Send ringtones and wallpapers Set or remove the The [...]]]></description>
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		<slash:comments>8</slash:comments>
	
		<series:name><![CDATA[Sending out an SMS]]></series:name>
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