tag:blogger.com,1999:blog-25796157820681587792011-04-21T20:14:16.012-07:00T - CarrierTONYhttp://www.blogger.com/profile/06364255118180435019noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-2579615782068158779.post-91405266035299212342008-02-07T19:10:00.000-08:002008-12-09T21:48:16.770-08:002008-12-09T21:48:16.770-08:00<span>T-carrier, is the generic designator for any of several digitally multiplexed telecommunications carrier systems developed by AT&T Bell Labs in 1957.<br /><br /><p><span><span><strong>Frequency</strong></span></span><span><strong><br /></strong></span>Voice band (0.3 - 3.4 KHz)<br /><br /><strong><span><span>Signal</span><br /></span></strong>Digital<br /><br /><strong><span><span>Line Code</span><br /></span></strong>AMI, B8ZS, HDB3<br />Mark : 3.0V dc<br />Space : 0V dc +/-0.30V dc<br />Pulse Width : 648 ns +/- 15 ns<br /><br /><strong><span><span>Modulation</span><br /></span></strong>Pulse Code Modulation(PCM)<br /><br /><span><strong><span>Multiplexing</span><br /></strong></span>Time Division Multiplexing(TDM)<br /><br /><strong><span><span>Transmission Direction</span></span></strong><br />Full Duplex<br /><br /><span><strong><span>Transmission Mode</span></strong></span><br />Synchronous<br /><br /><span><strong><span>Medium</span></strong></span><strong> </strong><br />Unsheilded Twisted Pair<br />24 AWG, 100 ohms impedance @ .772 MHz, 7 dB attenuation/ 1000 ft @ .772 MHz, 41 dB crosst per 1000 ft.<br />As Per Rs-568 - Level 1 & Level 2 type cable<br /><br /><span><strong>Cabling</strong></span><br />Co-directional 4 Wires </p><p><strong><span>Connectors</span></strong></p><p><span>Subminiature 15 female</span></p><br /><table cellpadding="5" align="center" border="1"><tbody><tr><td>1 <td>Send Data (tip) <tr><td>2 <td>Reserved for network <tr><td>3 <td>Receive Data (tip) <tr><td>4 <td>Reserved for network <tr><td>5 <td>Not defined <tr><td>6 <td>Not defined <tr><td>7 <td>Not defined <tr><td>8 <td>Not Defined <tr><td>9 <td>Send Data (ring) <tr><td>10 <td>No connect <tr><td>11 <td>Receive Data (ring) <tr><td>12 <td>No connect <tr><td>13 <td>No Connect <tr><td>14 <td>No connect <tr><td>15 <td>No connect </td></tr></tbody></table><br /><span>mini-modular 8 pin<span> <p<p p="" p="" p="" p="" p="" p="" p="" p="" p="" p="" p="" p="" p="" p="" p="" p="" p="" p="" p="" p="" p="" p="" p="" p=""><table cellpadding="5" align="center" border="1"><tbody><tr><td>1 <td>Transmit (ring) <tr><td>2 <td>Not Used <tr><td>3 <td>Not Used <tr><td>4 <td>Receive (ring) <tr><td>5 <td>Receive (tip) <tr><td>6 <td>Not Used <tr><td>7 <td>Not Used <tr><td>8 <td>Transmit (tip)</tbody></table><br /><span>RJ-48</span> <table cellpadding="5" align="center" border="1"><tbody><tr><td>1 <td>Receive (ring) <tr><td>2 <td>Receive (tip) <tr><td>3 <td>Not Used <tr><td>4 <td>Transmit (ring) <tr><td>5 <td>Transmit (tip) <tr><td>6 <td>Not Used <tr><td>7 <td>Not Used <tr><td>8 <td>Not Used </td></tr></tbody></table><br /><p><strong><span>T-Carrier Heirarchy</span></strong> </p><p><table cellpadding="5" border="1"><tbody><tr><td><strong>Carrier</strong> <td><strong>Signal Level</strong> <td><p><strong>No.Of </strong><strong>T1 </strong></p><p><strong>Signals</strong></p><td><strong>Voice </strong><strong>Channels</strong> <td><strong>Speed</strong> <tr><td><td>DS-0 <td>1/24 <td>1 <td>0.064 mbps <tr><td>T1 <td>DS-1 <td>1 <td>24 <td>1.544 mbps <tr><td>T1c <td>DS-1c <td>2 <td>48 <td>3.152 mbps <tr><td>T2 <td>DS-2 <td>4 <td>96 <td>6.176 mbps <tr><td>T3 <td>DS-3 <td>28 <td>672 <td>44.736 mbps <tr><td>T3c <td>DS-3c <td>56 <td>1344 <td>89.472 mbps <tr><td>T4 <td>DS-4 <td>168 <td>4032 <td>274.176mbps</td></tr></tbody></table></p><p><br /></p><p><strong><span>T1 Frame Structure<br /></span></strong></p><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://4.bp.blogspot.com/_dblkCiKEhwI/R6vNEz8ni5I/AAAAAAAAABE/zV62UZABQz0/s1600-h/frame.jpg"><img src="http://4.bp.blogspot.com/_dblkCiKEhwI/R6vNEz8ni5I/AAAAAAAAABE/zV62UZABQz0/s320/frame.jpg" border="0" alt="" id="BLOGGER_PHOTO_ID_5164446880258034578" /></a><br /><br /><br />Super Frame<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://1.bp.blogspot.com/_dblkCiKEhwI/R6vOoD8ni6I/AAAAAAAAABM/lE2RScOKGzs/s1600-h/super_frame.jpg"><img src="http://1.bp.blogspot.com/_dblkCiKEhwI/R6vOoD8ni6I/AAAAAAAAABM/lE2RScOKGzs/s320/super_frame.jpg" border="0" alt="" id="BLOGGER_PHOTO_ID_5164448585360051106" /></a><br /><br />Extended Super Frame<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://2.bp.blogspot.com/_dblkCiKEhwI/R6vQnT8ni7I/AAAAAAAAABU/IGIEs8ewYuo/s1600-h/extended_super_frame.jpg"><img src="http://2.bp.blogspot.com/_dblkCiKEhwI/R6vQnT8ni7I/AAAAAAAAABU/IGIEs8ewYuo/s320/extended_super_frame.jpg" border="0" alt="" id="BLOGGER_PHOTO_ID_5164450771498404786" /></a><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/2579615782068158779-9140526603529921234?l=carrierblog.blogspot.com' alt='' /></div>
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