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Data Coding Scheme
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<h2 id="message-character-sets">Message character sets</h2> <p>A special 7-bit encoding called the <a href="/facts/GSM_03.38/eFjyKNVp"><i>GSM 7 bit default alphabet</i></a> was designed for the Short Message System in GSM. The alphabet contains the most-often used symbols from most Western-European languages (and some Greek uppercase letters). Some <a href="/facts/ASCII/vGUI33Qu">ASCII</a> characters and the <a href="/facts/Euro_sign/boK32Hs4">Euro sign</a> did not fit into the GSM 7-bit default alphabet and must be encoded using two septets. These characters form GSM 7 bit default alphabet <i>extension table</i>. Support of the GSM 7-bit alphabet is mandatory for GSM handsets and network elements.<a class="footnote-ref" id="fnref:1" href="#fn:1"><sup>1</sup></a> </p><p>Languages which use <a href="/facts/Latin_script/7EWeJjUV">Latin script</a>, but use characters which are not present in the GSM 7-bit default alphabet, often replace missing characters with <a href="/facts/Diacritic/Rw6lMzQW">diacritic</a> marks with corresponding characters without diacritics, which causes not entirely satisfactory user experience, but is often accepted. In order to include these missing characters the 16-bit <a href="/facts/UTF-16/ofSmbCem">UTF-16</a> (in GSM called UCS-2) encoding may be used at the price of reducing the length of a (non-segmented) message from 160 to 70 characters. </p><p>The messages in Chinese, Korean or Japanese languages must be encoded using the <a href="/facts/UTF-16/ofSmbCem">UTF-16</a> character encoding. The same was also true for other languages using non-Latin scripts like Russian, Arabic, Hebrew and various Indian languages. In 3GPP TS 23.038 8.0.0 published in 2008 a new feature, an extended <a href="/facts/GSM_03.38/eFjyKNVp">National language shift table</a> was introduced, which in the version 11.0.0 published in 2012 covers <a href="/facts/Turkish_language/C5X56Ijp">Turkish</a>, <a href="/facts/Spanish_language/95BgYNfv">Spanish</a>, <a href="/facts/Portuguese_language/vr3Fwzw3">Portuguese</a>, <a href="/facts/Bengali_language/twpKobqA">Bengali</a>, <a href="/facts/Gujarati_language/kGKRRbwe">Gujarati</a>, <a href="/facts/Hindi/n1QIEeCC">Hindi</a>, <a href="/facts/Kannada/cooJ3trn">Kannada</a>, <a href="/facts/Malayalam/YLuvDWd3">Malayalam</a>, <a href="/facts/Oriya_language/RCSkWVSf">Oriya</a>, <a href="/facts/Punjabi_language/Dps9vRRe">Punjabi</a>, <a href="/facts/Tamil_language/7I0lHL0d">Tamil</a>, <a href="/facts/Telugu_language/yV5dQWhw">Telugu</a> and <a href="/facts/Urdu/oLrhuXc6">Urdu</a> languages. The mechanism replaces GSM 7-bit default alphabet code table and/or extended table with a national table(s) according to special information elements in <a href="/facts/User_Data_Header/VM1HWydv">User Data Header</a>. The non-segmented message using national language shift table(s) may carry up to 155 (or 153) 7-bit characters. </p><p>GSM recognizes only two encodings for <a href="/facts/Text_file/zYW4JmES">text messages</a> and one encoding for <a href="/facts/Binary_file/ysttM8hh">binary messages</a>: </p> <ul><li>GSM 7-bit default alphabet (which includes using of National language shift tables as well)</li> <li>UCS-2</li> <li>8-bit data</li></ul> <h2 id="message-classes">Message classes</h2> <p>The TP-DCS octet has a complex syntax to allow carrying of other information; the most notable are message classes: </p> Message Classes<table><tbody><tr><th>Value</th><th>Message Class</th></tr><tr><td>0 0</td><td>0 - <a href="/facts/Short_Message_Service/kacRfW0X">Flash messages</a></td></tr><tr><td>0 1</td><td>1 - ME-specific</td></tr><tr><td>1 0</td><td>2 - SIM / USIM specific</td></tr><tr><td>1 1</td><td>3 - TE-specific</td></tr></tbody></table> <p><a href="/facts/Short_Message_Service/kacRfW0X">Flash messages</a> are received by a mobile phone even though it has full memory. They are not stored in the phone, they just displayed on the phone display. </p> <h2 id="other-features">Other features</h2> <h3>Automatic deletion after reading</h3> <p>The handset should delete any message received with a TP-DCS value falling to the "Message Marked for Automatic Deletion Coding Group" after user has read it. </p> <h3>Message waiting indication</h3> <p>Message Waiting Indication group of DCS values serves to set or reset flags indicating presence of unread <a href="/facts/Voicemail/NLevuCf0">voicemail</a>, <a href="/facts/Fax/EBvf1cHA">fax</a>, <a href="/facts/E-mail/6pD9GLtI">e-mail</a> or other messages. </p> <h3>Data compression</h3> <p>A special DCS value also allows message <a href="/facts/Data_compression/gMFuY4FT">compression</a>, but it perhaps is not used by any operator. </p> <h2 id="dcs-values">DCS values</h2> <h3>SMS data coding scheme</h3> <p>The values of TP-DCS are defined in <a href="/facts/GSM_03.38/eFjyKNVp">GSM recommendation 03.38</a>.<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a> </p> <table><tbody><tr><th colspan="6">Coding Group: General Data Coding</th></tr><tr><th scope="column" colspan="2">DCShex dec</th><th>Character Set</th><th>Message Class</th><th scope="column">Compressed</th><th>Reserved Because</th></tr><tr><td>00</td><td>0</td><td>GSM 7 bit</td><td>Default</td><td>-</td><td></td></tr><tr><td>01</td><td>1</td><td>GSM 7 bit</td><td>Default</td><td>-</td><td>Bits 1 and 0 have value 1 but no message class present</td></tr><tr><td>02</td><td>2</td><td>GSM 7 bit</td><td>Default</td><td>-</td><td>Bits 1 and 0 have value 2 but no message class present</td></tr><tr><td>03</td><td>3</td><td>GSM 7 bit</td><td>Default</td><td>-</td><td>Bits 1 and 0 have value 3 but no message class present</td></tr><tr><td>04</td><td>4</td><td>8 bit data</td><td>Default</td><td>-</td><td></td></tr><tr><td>05</td><td>5</td><td>8 bit data</td><td>Default</td><td>-</td><td>Bits 1 and 0 have value 1 but no message class present</td></tr><tr><td>06</td><td>6</td><td>8 bit data</td><td>Default</td><td>-</td><td>Bits 1 and 0 have value 2 but no message class present</td></tr><tr><td>07</td><td>7</td><td>8 bit data</td><td>Default</td><td>-</td><td>Bits 1 and 0 have value 3 but no message class present</td></tr><tr><td>08</td><td>8</td><td>UCS2</td><td>Default</td><td>-</td><td></td></tr><tr><td>09</td><td>9</td><td>UCS2</td><td>Default</td><td>-</td><td>Bits 1 and 0 have value 1 but no message class present</td></tr><tr><td>0A</td><td>10</td><td>UCS2</td><td>Default</td><td>-</td><td>Bits 1 and 0 have value 2 but no message class present</td></tr><tr><td>0B</td><td>11</td><td>UCS2</td><td>Default</td><td>-</td><td>Bits 1 and 0 have value 3 but no message class present</td></tr><tr><td>0C</td><td>12</td><td>(reserved)</td><td>Default</td><td>-</td><td>Reserved character set</td></tr><tr><td>0D</td><td>13</td><td>(reserved)</td><td>Default</td><td>-</td><td>Reserved character set<p>Bits 1 and 0 have value 1 but no message class present</p></td></tr><tr><td>0E</td><td>14</td><td>(reserved)</td><td>Default</td><td>-</td><td>Reserved character set<p>Bits 1 and 0 have value 2 but no message class present</p></td></tr><tr><td>0F</td><td>15</td><td>(reserved)</td><td>Default</td><td>-</td><td>Reserved character set<p>Bits 1 and 0 have value 3 but no message class present</p></td></tr><tr><td>10</td><td>16</td><td>GSM 7 bit</td><td>Class 0 (Flash message)</td><td>-</td><td></td></tr><tr><td>11</td><td>17</td><td>GSM 7 bit</td><td>Class 1 (ME-specific)</td><td>-</td><td></td></tr><tr><td>12</td><td>18</td><td>GSM 7 bit</td><td>Class 2 (SIM/USIM-specific)</td><td>-</td><td></td></tr><tr><td>13</td><td>19</td><td>GSM 7 bit</td><td>Class 3 (TE-specific)</td><td>-</td><td></td></tr><tr><td>14</td><td>20</td><td>8 bit data</td><td>Class 0 (Flash message)</td><td>-</td><td></td></tr><tr><td>15</td><td>21</td><td>8 bit data</td><td>Class 1 (ME-specific)</td><td>-</td><td></td></tr><tr><td>16</td><td>22</td><td>8 bit data</td><td>Class 2 (SIM/USIM-specific)</td><td>-</td><td></td></tr><tr><td>17</td><td>23</td><td>8 bit data</td><td>Class 3 (TE-specific)</td><td>-</td><td></td></tr><tr><td>18</td><td>24</td><td>UCS2</td><td>Class 0 (Flash message)</td><td>-</td><td></td></tr><tr><td>19</td><td>25</td><td>UCS2</td><td>Class 1 (ME-specific)</td><td>-</td><td></td></tr><tr><td>1A</td><td>26</td><td>UCS2</td><td>Class 2 (SIM/USIM-specific)</td><td>-</td><td></td></tr><tr><td>1B</td><td>27</td><td>UCS2</td><td>Class 3 (TE-specific)</td><td>-</td><td></td></tr><tr><td>1C</td><td>28</td><td>(reserved)</td><td>Class 0 (Flash message)</td><td>-</td><td>Reserved character set</td></tr><tr><td>1D</td><td>29</td><td>(reserved)</td><td>Class 1 (ME-specific)</td><td>-</td><td>Reserved character set</td></tr><tr><td>1E</td><td>30</td><td>(reserved)</td><td>Class 2 (SIM/USIM-specific)</td><td>-</td><td>Reserved character set</td></tr><tr><td>1F</td><td>31</td><td>(reserved)</td><td>Class 3 (TE-specific)</td><td>-</td><td>Reserved character set</td></tr><tr><td>20</td><td>32</td><td>GSM 7 bit</td><td>Default</td><td>+</td><td></td></tr><tr><td>21</td><td>33</td><td>GSM 7 bit</td><td>Default</td><td>+</td><td>Bits 1 and 0 have value 1 but no message class present</td></tr><tr><td>22</td><td>34</td><td>GSM 7 bit</td><td>Default</td><td>+</td><td>Bits 1 and 0 have value 2 but no message class present</td></tr><tr><td>23</td><td>35</td><td>GSM 7 bit</td><td>Default</td><td>+</td><td>Bits 1 and 0 have value 3 but no message class present</td></tr><tr><td>24</td><td>36</td><td>8 bit data</td><td>Default</td><td>+</td><td>Compression set but Character set can't be compressed</td></tr><tr><td>25</td><td>37</td><td>8 bit data</td><td>Default</td><td>+</td><td>Compression set but Character set can't be compressed<p>Bits 1 and 0 have value 1 but no message class present</p></td></tr><tr><td>26</td><td>38</td><td>8 bit data</td><td>Default</td><td>+</td><td>Compression set but Character set can't be compressed<p>Bits 1 and 0 have value 2 but no message class present</p></td></tr><tr><td>27</td><td>39</td><td>8 bit data</td><td>Default</td><td>+</td><td>Compression set but Character set can't be compressed<p>Bits 1 and 0 have value 3 but no message class present</p></td></tr><tr><td>28</td><td>40</td><td>UCS2</td><td>Default</td><td>+</td><td>Compression set but Character set can't be compressed</td></tr><tr><td>29</td><td>41</td><td>UCS2</td><td>Default</td><td>+</td><td>Compression set but Character set can't be compressed<p>Bits 1 and 0 have value 1 but no message class present</p></td></tr><tr><td>2A</td><td>42</td><td>UCS2</td><td>Default</td><td>+</td><td>Compression set but Character set can't be compressed<p>Bits 1 and 0 have value 2 but no message class present</p></td></tr><tr><td>2B</td><td>43</td><td>UCS2</td><td>Default</td><td>+</td><td>Compression set but Character set can't be compressed<p>Bits 1 and 0 have value 3 but no message class present</p></td></tr><tr><td>2C</td><td>44</td><td>(reserved)</td><td>Default</td><td>+</td><td>Reserved character set</td></tr><tr><td>2D</td><td>45</td><td>(reserved)</td><td>Default</td><td>+</td><td>Reserved character set<p>Bits 1 and 0 have value 1 but no message class present</p></td></tr><tr><td>2E</td><td>46</td><td>(reserved)</td><td>Default</td><td>+</td><td>Reserved character set<p>Bits 1 and 0 have value 1 but no message class present</p></td></tr><tr><td>2F</td><td>47</td><td>(reserved)</td><td>Default</td><td>+</td><td>Reserved character set<p>Bits 1 and 0 have value 1 but no message class present</p></td></tr><tr><td>30</td><td>48</td><td>GSM 7 bit</td><td>Class 0 (Flash message)</td><td>+</td><td></td></tr><tr><td>31</td><td>49</td><td>GSM 7 bit</td><td>Class 1 (ME-specific)</td><td>+</td><td></td></tr><tr><td>32</td><td>50</td><td>GSM 7 bit</td><td>Class 2 (SIM/USIM-specific)</td><td>+</td><td></td></tr><tr><td>33</td><td>51</td><td>GSM 7 bit</td><td>Class 3 (TE-specific)</td><td>+</td><td></td></tr><tr><td>34</td><td>52</td><td>8 bit data</td><td>Class 0 (Flash message)</td><td>+</td><td>Compression set but Character set can't be compressed</td></tr><tr><td>35</td><td>53</td><td>8 bit data</td><td>Class 1 (ME-specific)</td><td>+</td><td>Compression set but Character set can't be compressed</td></tr><tr><td>36</td><td>54</td><td>8 bit data</td><td>Class 2 (SIM/USIM-specific)</td><td>+</td><td>Compression set but Character set can't be compressed</td></tr><tr><td>37</td><td>55</td><td>8 bit data</td><td>Class 3 (TE-specific)</td><td>+</td><td>Compression set but Character set can't be compressed</td></tr><tr><td>38</td><td>56</td><td>UCS2</td><td>Class 0 (Flash message)</td><td>+</td><td>Compression set but Character set can't be compressed</td></tr><tr><td>39</td><td>57</td><td>UCS2</td><td>Class 1 (ME-specific)</td><td>+</td><td>Compression set but Character set can't be compressed</td></tr><tr><td>3A</td><td>58</td><td>UCS2</td><td>Class 2 (SIM/USIM-specific)</td><td>+</td><td>Compression set but Character set can't be compressed</td></tr><tr><td>3B</td><td>59</td><td>UCS2</td><td>Class 3 (TE-specific)</td><td>+</td><td>Compression set but Character set can't be compressed</td></tr><tr><td>3C</td><td>60</td><td>(reserved)</td><td>Class 0 (Flash message)</td><td>+</td><td>Reserved character set</td></tr><tr><td>3D</td><td>61</td><td>(reserved)</td><td>Class 1 (ME-specific)</td><td>+</td><td>Reserved character set</td></tr><tr><td>3E</td><td>62</td><td>(reserved)</td><td>Class 2 (SIM/USIM-specific)</td><td>+</td><td>Reserved character set</td></tr><tr><td>3F</td><td>63</td><td>(reserved)</td><td>Class 3 (TE-specific)</td><td>+</td><td>Reserved character set</td></tr><tr><th colspan="6">Coding Group: Message Marked for Automatic Deletion</th></tr><tr><th scope="column" colspan="2">DCShex dec</th><th>Character Set</th><th>Message Class</th><th scope="column">Compressed</th><th>Reserved Because</th></tr><tr><td>40</td><td>64</td><td>GSM 7 bit</td><td>Default</td><td>-</td><td></td></tr><tr><td>41</td><td>65</td><td>GSM 7 bit</td><td>Default</td><td>-</td><td>Bits 1 and 0 have value 1 but no message class present</td></tr><tr><td>42</td><td>66</td><td>GSM 7 bit</td><td>Default</td><td>-</td><td>Bits 1 and 0 have value 2 but no message class present</td></tr><tr><td>43</td><td>67</td><td>GSM 7 bit</td><td>Default</td><td>-</td><td>Bits 1 and 0 have value 3 but no message class present</td></tr><tr><td>44</td><td>68</td><td>8 bit data</td><td>Default</td><td>-</td><td></td></tr><tr><td>45</td><td>69</td><td>8 bit data</td><td>Default</td><td>-</td><td>Bits 1 and 0 have value 1 but no message class present</td></tr><tr><td>46</td><td>70</td><td>8 bit data</td><td>Default</td><td>-</td><td>Bits 1 and 0 have value 2 but no message class present</td></tr><tr><td>47</td><td>71</td><td>8 bit data</td><td>Default</td><td>-</td><td>Bits 1 and 0 have value 3 but no message class present</td></tr><tr><td>48</td><td>72</td><td>UCS2</td><td>Default</td><td>-</td><td></td></tr><tr><td>49</td><td>73</td><td>UCS2</td><td>Default</td><td>-</td><td>Bits 1 and 0 have value 1 but no message class present</td></tr><tr><td>4A</td><td>74</td><td>UCS2</td><td>Default</td><td>-</td><td>Bits 1 and 0 have value 2 but no message class present</td></tr><tr><td>4B</td><td>75</td><td>UCS2</td><td>Default</td><td>-</td><td>Bits 1 and 0 have value 3 but no message class present</td></tr><tr><td>4C</td><td>76</td><td>(reserved)</td><td>Default</td><td>-</td><td>Reserved character set</td></tr><tr><td>4D</td><td>77</td><td>(reserved)</td><td>Default</td><td>-</td><td>Reserved character set<p>Bits 1 and 0 have value 1 but no message class present</p></td></tr><tr><td>4E</td><td>78</td><td>(reserved)</td><td>Default</td><td>-</td><td>Reserved character set<p>Bits 1 and 0 have value 2 but no message class present</p></td></tr><tr><td>4F</td><td>79</td><td>(reserved)</td><td>Default</td><td>-</td><td>Reserved character set<p>Bits 1 and 0 have value 3 but no message class present</p></td></tr><tr><td>50</td><td>80</td><td>GSM 7 bit</td><td>Class 0 (Flash message)</td><td>-</td><td></td></tr><tr><td>51</td><td>81</td><td>GSM 7 bit</td><td>Class 1 (ME-specific)</td><td>-</td><td></td></tr><tr><td>52</td><td>82</td><td>GSM 7 bit</td><td>Class 2 (SIM/USIM-specific)</td><td>-</td><td></td></tr><tr><td>53</td><td>83</td><td>GSM 7 bit</td><td>Class 3 (TE-specific)</td><td>-</td><td></td></tr><tr><td>54</td><td>84</td><td>8 bit data</td><td>Class 0 (Flash message)</td><td>-</td><td></td></tr><tr><td>55</td><td>85</td><td>8 bit data</td><td>Class 1 (ME-specific)</td><td>-</td><td></td></tr><tr><td>56</td><td>86</td><td>8 bit data</td><td>Class 2 (SIM/USIM-specific)</td><td>-</td><td></td></tr><tr><td>57</td><td>87</td><td>8 bit data</td><td>Class 3 (TE-specific)</td><td>-</td><td></td></tr><tr><td>58</td><td>88</td><td>UCS2</td><td>Class 0 (Flash message)</td><td>-</td><td></td></tr><tr><td>59</td><td>89</td><td>UCS2</td><td>Class 1 (ME-specific)</td><td>-</td><td></td></tr><tr><td>5A</td><td>90</td><td>UCS2</td><td>Class 2 (SIM/USIM-specific)</td><td>-</td><td></td></tr><tr><td>5B</td><td>91</td><td>UCS2</td><td>Class 3 (TE-specific)</td><td>-</td><td></td></tr><tr><td>5C</td><td>92</td><td>(reserved)</td><td>Class 0 (Flash message)</td><td>-</td><td>Reserved character set</td></tr><tr><td>5D</td><td>93</td><td>(reserved)</td><td>Class 1 (ME-specific)</td><td>-</td><td>Reserved character set</td></tr><tr><td>5E</td><td>94</td><td>(reserved)</td><td>Class 2 (SIM/USIM-specific)</td><td>-</td><td>Reserved character set</td></tr><tr><td>5F</td><td>95</td><td>(reserved)</td><td>Class 3 (TE-specific)</td><td>-</td><td>Reserved character set</td></tr><tr><td>60</td><td>96</td><td>GSM 7 bit</td><td>Default</td><td>+</td><td></td></tr><tr><td>61</td><td>97</td><td>GSM 7 bit</td><td>Default</td><td>+</td><td>Bits 1 and 0 have value 1 but no message class present</td></tr><tr><td>62</td><td>98</td><td>GSM 7 bit</td><td>Default</td><td>+</td><td>Bits 1 and 0 have value 2 but no message class present</td></tr><tr><td>63</td><td>99</td><td>GSM 7 bit</td><td>Default</td><td>+</td><td>Bits 1 and 0 have value 3 but no message class present</td></tr><tr><td>64</td><td>100</td><td>8 bit data</td><td>Default</td><td>+</td><td>Compression set but Character set can't be compressed</td></tr><tr><td>65</td><td>101</td><td>8 bit data</td><td>Default</td><td>+</td><td>Compression set but Character set can't be compressed<p>Bits 1 and 0 have value 1 but no message class present</p></td></tr><tr><td>66</td><td>102</td><td>8 bit data</td><td>Default</td><td>+</td><td>Compression set but Character set can't be compressed<p>Bits 1 and 0 have value 2 but no message class present</p></td></tr><tr><td>67</td><td>103</td><td>8 bit data</td><td>Default</td><td>+</td><td>Compression set but Character set can't be compressed<p>Bits 1 and 0 have value 3 but no message class present</p></td></tr><tr><td>68</td><td>104</td><td>UCS2</td><td>Default</td><td>+</td><td>Compression set but Character set can't be compressed</td></tr><tr><td>69</td><td>105</td><td>UCS2</td><td>Default</td><td>+</td><td>Compression set but Character set can't be compressed<p>Bits 1 and 0 have value 1 but no message class present</p></td></tr><tr><td>6A</td><td>106</td><td>UCS2</td><td>Default</td><td>+</td><td>Compression set but Character set can't be compressed<p>Bits 1 and 0 have value 2 but no message class present</p></td></tr><tr><td>6B</td><td>107</td><td>UCS2</td><td>Default</td><td>+</td><td>Compression set but Character set can't be compressed<p>Bits 1 and 0 have value 3 but no message class present</p></td></tr><tr><td>6C</td><td>108</td><td>(reserved)</td><td>Default</td><td>+</td><td>Reserved character set</td></tr><tr><td>6D</td><td>109</td><td>(reserved)</td><td>Default</td><td>+</td><td>Reserved character set<p>Bits 1 and 0 have value 1 but no message class present</p></td></tr><tr><td>6E</td><td>110</td><td>(reserved)</td><td>Default</td><td>+</td><td>Reserved character set<p>Bits 1 and 0 have value 2 but no message class present</p></td></tr><tr><td>6F</td><td>111</td><td>(reserved)</td><td>Default</td><td>+</td><td>Reserved character set<p>Bits 1 and 0 have value 3 but no message class present</p></td></tr><tr><td>70</td><td>112</td><td>GSM 7 bit</td><td>Class 0 (Flash message)</td><td>+</td><td></td></tr><tr><td>71</td><td>113</td><td>GSM 7 bit</td><td>Class 1 (ME-specific)</td><td>+</td><td></td></tr><tr><td>72</td><td>114</td><td>GSM 7 bit</td><td>Class 2 (SIM/USIM-specific)</td><td>+</td><td></td></tr><tr><td>73</td><td>115</td><td>GSM 7 bit</td><td>Class 3 (TE-specific)</td><td>+</td><td></td></tr><tr><td>74</td><td>116</td><td>8 bit data</td><td>Class 0 (Flash message)</td><td>+</td><td>Compression set but Character set can't be compressed</td></tr><tr><td>75</td><td>117</td><td>8 bit data</td><td>Class 1 (ME-specific)</td><td>+</td><td>Compression set but Character set can't be compressed</td></tr><tr><td>76</td><td>118</td><td>8 bit data</td><td>Class 2 (SIM/USIM-specific)</td><td>+</td><td>Compression set but Character set can't be compressed</td></tr><tr><td>77</td><td>119</td><td>8 bit data</td><td>Class 3 (TE-specific)</td><td>+</td><td>Compression set but Character set can't be compressed</td></tr><tr><td>78</td><td>120</td><td>UCS2</td><td>Class 0 (Flash message)</td><td>+</td><td>Compression set but Character set can't be compressed</td></tr><tr><td>79</td><td>121</td><td>UCS2</td><td>Class 1 (ME-specific)</td><td>+</td><td>Compression set but Character set can't be compressed</td></tr><tr><td>7A</td><td>122</td><td>UCS2</td><td>Class 2 (SIM/USIM-specific)</td><td>+</td><td>Compression set but Character set can't be compressed</td></tr><tr><td>7B</td><td>123</td><td>UCS2</td><td>Class 3 (TE-specific)</td><td>+</td><td>Compression set but Character set can't be compressed</td></tr><tr><td>7C</td><td>124</td><td>(reserved)</td><td>Class 0 (Flash message)</td><td>+</td><td>Reserved character set</td></tr><tr><td>7D</td><td>125</td><td>(reserved)</td><td>Class 1 (ME-specific)</td><td>+</td><td>Reserved character set</td></tr><tr><td>7E</td><td>126</td><td>(reserved)</td><td>Class 2 (SIM/USIM-specific)</td><td>+</td><td>Reserved character set</td></tr><tr><td>7F</td><td>127</td><td>(reserved)</td><td>Class 3 (TE-specific)</td><td>+</td><td>Reserved character set</td></tr><tr><th colspan="6">Coding Group: Reserved</th></tr><tr><th scope="column" colspan="2">DCShex dec</th><th>Character Set</th><th>Message Class</th><th scope="column">Compressed</th><th>Reserved Because</th></tr><tr><td>80</td><td>128</td><td>(not defined)</td><td>Default</td><td>-</td><td>Reserved coding group</td></tr><tr><td colspan="6">... up to ...</td></tr><tr><td>BF</td><td>191</td><td>(not defined)</td><td>Default</td><td>-</td><td>Reserved coding group</td></tr><tr><th colspan="6">Coding Group: Message Waiting Info: Discard Message</th></tr><tr><th scope="column" colspan="2">DCShex dec</th><th>Character Set</th><th>Message Waiting Information</th><th scope="column">Compressed</th><th>Reserved Because</th></tr><tr><td>C0</td><td>192</td><td>(not defined)</td><td>Voicemail Inactive</td><td>-</td><td></td></tr><tr><td>C1</td><td>193</td><td>(not defined)</td><td>Fax Inactive</td><td>-</td><td></td></tr><tr><td>C2</td><td>194</td><td>(not defined)</td><td>E-mail Inactive</td><td>-</td><td></td></tr><tr><td>C3</td><td>195</td><td>(not defined)</td><td>Other Inactive</td><td>-</td><td></td></tr><tr><td>C4</td><td>196</td><td>(not defined)</td><td>Voicemail Inactive</td><td>-</td><td>Value of bit 2</td></tr><tr><td>C5</td><td>197</td><td>(not defined)</td><td>Fax Inactive</td><td>-</td><td>Value of bit 2</td></tr><tr><td>C6</td><td>198</td><td>(not defined)</td><td>E-mail Inactive</td><td>-</td><td>Value of bit 2</td></tr><tr><td>C7</td><td>199</td><td>(not defined)</td><td>Other Inactive</td><td>-</td><td>Value of bit 2</td></tr><tr><td>C8</td><td>200</td><td>(not defined)</td><td>Voicemail Active</td><td>-</td><td></td></tr><tr><td>C9</td><td>201</td><td>(not defined)</td><td>Fax Active</td><td>-</td><td></td></tr><tr><td>CA</td><td>202</td><td>(not defined)</td><td>E-mail Active</td><td>-</td><td></td></tr><tr><td>CB</td><td>203</td><td>(not defined)</td><td>Other Active</td><td>-</td><td></td></tr><tr><td>CC</td><td>204</td><td>(not defined)</td><td>Voicemail Active</td><td>-</td><td>Value of bit 2</td></tr><tr><td>CD</td><td>205</td><td>(not defined)</td><td>Fax Active</td><td>-</td><td>Value of bit 2</td></tr><tr><td>CE</td><td>206</td><td>(not defined)</td><td>E-mail Active</td><td>-</td><td>Value of bit 2</td></tr><tr><td>CF</td><td>207</td><td>(not defined)</td><td>Other Active</td><td>-</td><td>Value of bit 2</td></tr><tr><th colspan="6">Coding Group: Message Waiting Info: Store Message</th></tr><tr><th scope="column" colspan="2">DCShex dec</th><th>Character Set</th><th>Message Waiting Information</th><th scope="column">Compressed</th><th>Reserved Because</th></tr><tr><td>D0</td><td>208</td><td>GSM 7 bit</td><td>Voicemail Inactive</td><td>-</td><td></td></tr><tr><td>D1</td><td>209</td><td>GSM 7 bit</td><td>Fax Inactive</td><td>-</td><td></td></tr><tr><td>D2</td><td>210</td><td>GSM 7 bit</td><td>E-mail Inactive</td><td>-</td><td></td></tr><tr><td>D3</td><td>211</td><td>GSM 7 bit</td><td>Other Inactive</td><td>-</td><td></td></tr><tr><td>D4</td><td>212</td><td>GSM 7 bit</td><td>Voicemail Inactive</td><td>-</td><td>Value of bit 2</td></tr><tr><td>D5</td><td>213</td><td>GSM 7 bit</td><td>Fax Inactive</td><td>-</td><td>Value of bit 2</td></tr><tr><td>D6</td><td>214</td><td>GSM 7 bit</td><td>E-mail Inactive</td><td>-</td><td>Value of bit 2</td></tr><tr><td>D7</td><td>215</td><td>GSM 7 bit</td><td>Other Inactive</td><td>-</td><td>Value of bit 2</td></tr><tr><td>D8</td><td>216</td><td>GSM 7 bit</td><td>Voicemail Active</td><td>-</td><td></td></tr><tr><td>D9</td><td>217</td><td>GSM 7 bit</td><td>Fax Active</td><td>-</td><td></td></tr><tr><td>DA</td><td>218</td><td>GSM 7 bit</td><td>E-mail Active</td><td>-</td><td></td></tr><tr><td>DB</td><td>219</td><td>GSM 7 bit</td><td>Other Active</td><td>-</td><td></td></tr><tr><td>DC</td><td>220</td><td>GSM 7 bit</td><td>Voicemail Active</td><td>-</td><td>Value of bit 2</td></tr><tr><td>DD</td><td>221</td><td>GSM 7 bit</td><td>Fax Active</td><td>-</td><td>Value of bit 2</td></tr><tr><td>DE</td><td>222</td><td>GSM 7 bit</td><td>E-mail Active</td><td>-</td><td>Value of bit 2</td></tr><tr><td>DF</td><td>223</td><td>GSM 7 bit</td><td>Other Active</td><td>-</td><td>Value of bit 2</td></tr><tr><td>E0</td><td>224</td><td>UCS2</td><td>Voicemail Inactive</td><td>-</td><td></td></tr><tr><td>E1</td><td>225</td><td>UCS2</td><td>Fax Inactive</td><td>-</td><td></td></tr><tr><td>E2</td><td>226</td><td>UCS2</td><td>E-mail Inactive</td><td>-</td><td></td></tr><tr><td>E3</td><td>227</td><td>UCS2</td><td>Other Inactive</td><td>-</td><td></td></tr><tr><td>E4</td><td>228</td><td>UCS2</td><td>Voicemail Inactive</td><td>-</td><td>Value of bit 2</td></tr><tr><td>E5</td><td>229</td><td>UCS2</td><td>Fax Inactive</td><td>-</td><td>Value of bit 2</td></tr><tr><td>E6</td><td>230</td><td>UCS2</td><td>E-mail Inactive</td><td>-</td><td>Value of bit 2</td></tr><tr><td>E7</td><td>231</td><td>UCS2</td><td>Other Inactive</td><td>-</td><td>Value of bit 2</td></tr><tr><td>E8</td><td>232</td><td>UCS2</td><td>Voicemail Active</td><td>-</td><td></td></tr><tr><td>E9</td><td>233</td><td>UCS2</td><td>Fax Active</td><td>-</td><td></td></tr><tr><td>EA</td><td>234</td><td>UCS2</td><td>E-mail Active</td><td>-</td><td></td></tr><tr><td>EB</td><td>235</td><td>UCS2</td><td>Other Active</td><td>-</td><td></td></tr><tr><td>EC</td><td>236</td><td>UCS2</td><td>Voicemail Active</td><td>-</td><td>Value of bit 2</td></tr><tr><td>ED</td><td>237</td><td>UCS2</td><td>Fax Active</td><td>-</td><td>Value of bit 2</td></tr><tr><td>EE</td><td>238</td><td>UCS2</td><td>E-mail Active</td><td>-</td><td>Value of bit 2</td></tr><tr><td>EF</td><td>239</td><td>UCS2</td><td>Other Active</td><td>-</td><td>Value of bit 2</td></tr><tr><th colspan="6">Coding Group: Data Coding/Message Class</th></tr><tr><th scope="column" colspan="2">DCShex dec</th><th>Character Set</th><th>Message Class</th><th scope="column">Compressed</th><th>Reserved Because</th></tr><tr><td>F0</td><td>240</td><td>GSM 7 bit</td><td>Class 0 (Flash message)</td><td>-</td><td></td></tr><tr><td>F1</td><td>241</td><td>GSM 7 bit</td><td>Class 1 (ME-specific)</td><td>-</td><td></td></tr><tr><td>F2</td><td>242</td><td>GSM 7 bit</td><td>Class 2 (SIM/USIM-specific)</td><td>-</td><td></td></tr><tr><td>F3</td><td>243</td><td>GSM 7 bit</td><td>Class 3 (TE-specific)</td><td>-</td><td></td></tr><tr><td>F4</td><td>244</td><td>8 bit data</td><td>Class 0 (Flash message)</td><td>-</td><td></td></tr><tr><td>F5</td><td>245</td><td>8 bit data</td><td>Class 1 (ME-specific)</td><td>-</td><td></td></tr><tr><td>F6</td><td>246</td><td>8 bit data</td><td>Class 2 (SIM/USIM-specific)</td><td>-</td><td></td></tr><tr><td>F7</td><td>247</td><td>8 bit data</td><td>Class 3 (TE-specific)</td><td>-</td><td></td></tr><tr><td>F8</td><td>248</td><td>GSM 7 bit</td><td>Class 0 (Flash message)</td><td>-</td><td>Value of bit 3</td></tr><tr><td>F9</td><td>249</td><td>GSM 7 bit</td><td>Class 1 (ME-specific)</td><td>-</td><td>Value of bit 3</td></tr><tr><td>FA</td><td>250</td><td>GSM 7 bit</td><td>Class 2 (SIM/USIM-specific)</td><td>-</td><td>Value of bit 3</td></tr><tr><td>FB</td><td>251</td><td>GSM 7 bit</td><td>Class 3 (TE-specific)</td><td>-</td><td>Value of bit 3</td></tr><tr><td>FC</td><td>252</td><td>8 bit data</td><td>Class 0 (Flash message)</td><td>-</td><td>Value of bit 3</td></tr><tr><td>FD</td><td>253</td><td>8 bit data</td><td>Class 1 (ME-specific)</td><td>-</td><td>Value of bit 3</td></tr><tr><td>FE</td><td>254</td><td>8 bit data</td><td>Class 2 (SIM/USIM-specific)</td><td>-</td><td>Value of bit 3</td></tr><tr><td>FF</td><td>255</td><td>8 bit data</td><td>Class 3 (TE-specific)</td><td>-</td><td>Value of bit 3</td></tr></tbody></table> <p><a href="/facts/IDEN/8z337omj">iDEN</a> mobile standard uses values F716 and F816 in a special way. </p> <h3>CBS data coding scheme</h3> <p>For the DCS values in Cell Broadcast Messages see <a href="/facts/GSM_03.38/eFjyKNVp">GSM recommendation 03.38</a>.<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a> </p> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/Short_Message_Service/kacRfW0X">Short Message Service</a> (SMS)</li> <li><a href="/facts/Cell_Broadcast/qCzkvQXB">Cell Broadcast</a></li> <li><a href="/facts/GSM_03.38/eFjyKNVp">GSM 03.38</a></li> <li><a href="/facts/GSM_03.40/9AqlJ2DP">GSM 03.40</a></li> <li><a href="/facts/User_Data_Header/VM1HWydv">User Data Header</a></li> <li><a href="/facts/Concatenated_SMS/z80CoB3z">Concatenated SMS</a></li> <li><a href="/facts/Short_message_service_technical_realisation_(GSM)/8rIG8wQj">Short message service technical realisation (GSM)</a></li> <li><a href="/facts/Enhanced_Messaging_Service/hzdWGdnv">Enhanced Messaging Service</a></li> <li><a href="/facts/Multimedia_Messaging_Service/Pg5CvwLx">Multimedia Messaging Service</a></li> <li><a href="/facts/Short_Message_Peer-to-Peer/T6QnR9Qr">Short Message Peer-to-Peer</a></li> <li><a href="/facts/Universal_Computer_Protocol/vSTlEK5y">Universal Computer Protocol</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>3GPP TS 23.038, Alphabets and language-specific information. <a href="http://www.3gpp.org/ftp/Specs/html-info/23038.htm" target="_blank">http://www.3gpp.org/ftp/Specs/html-info/23038.htm</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>3GPP TS 23.038, Alphabets and language-specific information. <a href="http://www.3gpp.org/ftp/Specs/html-info/23038.htm" target="_blank">http://www.3gpp.org/ftp/Specs/html-info/23038.htm</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>3GPP TS 23.038, Alphabets and language-specific information. <a href="http://www.3gpp.org/ftp/Specs/html-info/23038.htm" target="_blank">http://www.3gpp.org/ftp/Specs/html-info/23038.htm</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> </ol>