请教几个问题。谢谢大家

uuzte

1.我在<span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'mso-fareast-font-family:宋体;mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa;;">SOFTWARE SPECIFICATIONS中看到 <div align="center"><table class="MsoNormalTable" cellspacing="0" cellpadding="0" border="1" style="BORDER-RIGHT: medium none; BORDER-TOP: medium none; BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: collapse; mso-table-layout-alt: fixed; mso-border-alt: solid windowtext .5pt; mso-padding-alt: 0cm 4.95pt 0cm 4.95pt; mso-border-insideh: .5pt solid windowtext; mso-border-insidev: .5pt solid windowtext;"><tbody><tr style="HEIGHT: 12.4pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes; mso-yfti-lastrow: yes; page-break-inside: avoid;"><td valign="top" width="91" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 4.95pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 4.95pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 68.35pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 12.4pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt;"><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12pt; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: arial; mso-fareast-language: zh-cn;">Mandatory <p></p></span></p><p></p><p></p></td><td valign="top" width="276" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 4.95pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 4.95pt; BORDER-LEFT-COLOR: #ece9d8; PADDING-BOTTOM: 0cm; WIDTH: 207pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 12.4pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt;"><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12pt; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: arial; mso-fareast-language: zh-cn;">Indication of</span><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: red; FONT-FAMILY: arial; mso-fareast-language: zh-cn;"> Call Progress Signals</span><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: arial; mso-fareast-language: zh-cn;">
                                                                        <p></p></span></p><p></p><p></p></td></tr></tbody></table></div><p>想问问大家，call progress singal是什么意思啊？有何作用。</p></span><font size="2">想问问大家，call progress singal是什么意思啊？有何作用。 </font><p>2。</p><div align="center"><table class="MsoNormalTable" cellspacing="0" cellpadding="0" border="1" style="BORDER-RIGHT: medium none; BORDER-TOP: medium none; BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: collapse; mso-table-layout-alt: fixed; mso-border-alt: solid windowtext .5pt; mso-padding-alt: 0cm 4.95pt 0cm 4.95pt; mso-border-insideh: .5pt solid windowtext; mso-border-insidev: .5pt solid windowtext;"><tbody><tr style="HEIGHT: 12.4pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes; mso-yfti-lastrow: yes; page-break-inside: avoid;"><td valign="top" width="91" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 4.95pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 4.95pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 68.35pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 12.4pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt;"><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12pt; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: arial; mso-fareast-language: zh-cn;">Optional <p></p></span></p><p></p><p></p></td><td valign="top" width="276" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 4.95pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 4.95pt; BORDER-LEFT-COLOR: #ece9d8; PADDING-BOTTOM: 0cm; WIDTH: 207pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 12.4pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt;"><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12pt; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: arial; mso-fareast-language: zh-cn;">I</span><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: red; FONT-FAMILY: arial; mso-fareast-language: zh-cn;">nternational Access Function ("+"</span><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: arial; mso-fareast-language: zh-cn;"> key) <p></p></span></p><p></p><p></p></td></tr></tbody></table></div><p>这个是啥东东啊？</p><p>3.</p><div align="center"><table class="MsoNormalTable" cellspacing="0" cellpadding="0" border="1" style="BORDER-RIGHT: medium none; BORDER-TOP: medium none; BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: collapse; mso-table-layout-alt: fixed; mso-border-alt: solid windowtext .5pt; mso-padding-alt: 0cm 4.95pt 0cm 4.95pt; mso-border-insideh: .5pt solid windowtext; mso-border-insidev: .5pt solid windowtext;"><tbody><tr style="HEIGHT: 12.4pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes; mso-yfti-lastrow: yes; page-break-inside: avoid;"><td valign="top" width="91" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 4.95pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 4.95pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 68.35pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 12.4pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt;"><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12pt; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: arial; mso-fareast-language: zh-cn;">Mandatory <p></p></span></p><p></p><p></p></td><td valign="top" width="276" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 4.95pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 4.95pt; BORDER-LEFT-COLOR: #ece9d8; PADDING-BOTTOM: 0cm; WIDTH: 207pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 12.4pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt;"><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12pt; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: red; FONT-FAMILY: arial; mso-fareast-language: zh-cn;">Subscription Identity Management <p></p></span></p><p></p><p></p></td></tr></tbody></table></div>红字不知道是什么意思，是个什么功能啊？