div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: GSM R - University of HoustonklongpostersgsmpdfABIS Stacks MAP TCAP sccp MTP HI-R ISUP psTN 8 GSM CM MM LAPDm MS Protocol LAPDm BTS TRAU TRX Public Switched Network src=https:reader034vdocumentsnetreader034viewer20220513075ab83e3c7f8b9a28468c9c41html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-thumb alt=Page 2: GSM R - University of HoustonklongpostersgsmpdfABIS Stacks MAP TCAP sccp MTP HI-R ISUP psTN 8 GSM CM MM LAPDm MS Protocol LAPDm BTS TRAU TRX Public Switched Network src=https:reader034vdocumentsnetreader034viewer20220513075ab83e3c7f8b9a28468c9c41html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdiv