{"id":1317,"date":"2020-08-18T12:46:22","date_gmt":"2020-08-18T02:46:22","guid":{"rendered":"https:\/\/blog.hegars.com\/?p=1317"},"modified":"2020-08-19T03:02:30","modified_gmt":"2020-08-18T17:02:30","slug":"isdn-bri","status":"publish","type":"post","link":"https:\/\/blog.hegars.com\/?p=1317","title":{"rendered":"ISDN &#8211; BRI (Basic Rate Interface)"},"content":{"rendered":"\n<p><a href=\"https:\/\/www.cisco.com\/c\/en\/us\/td\/docs\/ios\/dial\/configuration\/guide\/12_2sr\/dia_12_2sr_book\/dia_cfg_isdn_bri.html\">https:\/\/www.cisco.com\/c\/en\/us\/td\/docs\/ios\/dial\/configuration\/guide\/12_2sr\/dia_12_2sr_book\/dia_cfg_isdn_bri.html<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.cisco.com\/c\/en\/us\/support\/docs\/dial-access\/integrated-services-digital-networks-isdn-channel-associated-signaling-cas\/22802-bri-loopback-call.html\">https:\/\/www.cisco.com\/c\/en\/us\/support\/docs\/dial-access\/integrated-services-digital-networks-isdn-channel-associated-signaling-cas\/22802-bri-loopback-call.html<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.cisco.com\/c\/en\/us\/support\/docs\/voice\/digital-ccs\/15415-bri-voice-port-cfg.html\">https:\/\/www.cisco.com\/c\/en\/us\/support\/docs\/voice\/digital-ccs\/15415-bri-voice-port-cfg.html<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Telstra Exit Date<\/h2>\n\n\n\n<p class=\"has-text-align-left\">The final exit date for ISDN in all areas nationwide is 31 May 2022.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Interfaces<\/h3>\n\n\n\n<ul><li>U<\/li><li>S\/T<\/li><li>S<\/li><li>T<\/li><li>R<\/li><\/ul>\n\n\n\n<ul><li>NT1<\/li><li>NT2<\/li><li>TA<\/li><li>TE<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">B\/D Channels<\/h3>\n\n\n\n<ul><li>2 x 64kbps (B) channels <\/li><li>1 x 16kbps (D) channel<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Protocols<\/h3>\n\n\n\n<ul><li>Q.921 describes data-link LAPD <\/li><li>Q.931 describes network layer<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">TE startup sequence<\/h3>\n\n\n\n<ul><li>Line inactive<\/li><li>TE becomes active and signals a&nbsp; 7E&nbsp; HDLC flag&nbsp;&nbsp; (7E = \u201c01111110\u201d)<\/li><li>Network switch send frame with the A-bit set to 0&nbsp; (A=0&nbsp;&nbsp; = no activated)<\/li><li>TE then synchronises on three successive pairs of line code voilations<\/li><li>TE then starts sending physical frames<\/li><li>NT synchronises using line code violations<\/li><li>NT starts sending frames with A-bit set to 1&nbsp;&nbsp; (A=1&nbsp;&nbsp; = activated)<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Alarms<\/h2>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">OSI Layers<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Layer 1<\/h2>\n\n\n\n<p><a href=\"https:\/\/www.cisco.com\/c\/en\/us\/support\/docs\/dial-access\/integrated-services-digital-networks-isdn-channel-associated-signaling-cas\/5706-bri-layer1.html\">https:\/\/www.cisco.com\/c\/en\/us\/support\/docs\/dial-access\/integrated-services-digital-networks-isdn-channel-associated-signaling-cas\/5706-bri-layer1.html<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">NIST Testing Procedures<\/h3>\n\n\n\n<div class=\"wp-block-file\"><a href=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/08\/nistspecialpublication500-194.pdf\">nistspecialpublication500-194<\/a><a href=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/08\/nistspecialpublication500-194.pdf\" class=\"wp-block-file__button\" download>Download<\/a><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">User Mode (TE) States<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><th>L1 State<\/th><th>L1 State Name<\/th><th>L1 State Description<\/th><\/tr><tr><td>F1<\/td><td>Inactive<\/td><td>In this inactive (powered-off) state, the terminal equipment (TE)<sup>1<\/sup>&nbsp;is not transmitting and can not detect the presence of any input signals.<\/td><\/tr><tr><td>F2<\/td><td>Sensing<\/td><td>This state is entered after the TE has been powered on but has not determined the type of signal (if any) that the TE is receiving. When in this state, a TE may go into a low power consumption mode.<\/td><\/tr><tr><td>F3<\/td><td>Deactivated<\/td><td>This is the deactivated state of the physical protocol. Neither the network termination (NT)<sup>2<\/sup>&nbsp;nor the TE is transmitting. When in this state, a TE may go to a low power consumption mode.<\/td><\/tr><tr><td>F4<\/td><td>Awaiting Signal<\/td><td>When the TE wishes to initiate activation, it sends an Activation signal to the NT and awaits a response.<\/td><\/tr><tr><td>F5<\/td><td>Identifying Input<\/td><td>At first receipt of any signal from the NT, the TE stops sending Activation signals and awaits the activation signal or synchronized frame from the NT.<\/td><\/tr><tr><td>F6<\/td><td>Synchronized<\/td><td>When the TE has received an activation signal from the NT, it responds with a synchronized frame and is awaiting a synchronized frame from the NT.<\/td><\/tr><tr><td>F7<\/td><td>Activated<\/td><td>This is the normal active state, with the protocol activated in both directions. Both the NT and the TE are transmitting normal frames. State F7 is the only state where B-channel and D-channel contain operational data.<\/td><\/tr><tr><td>F8<\/td><td>Lost Framing<\/td><td>This is the condition when the TE has lost frame synchronization and is awaiting re-synchronization.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Network Mode (NT1) States<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>L1 State<\/strong><\/td><td><strong>L1 State Name<\/strong><\/td><td><strong>L1 State Description<\/strong><\/td><\/tr><tr><td>G1<\/td><td>Deactivated<\/td><td><\/td><\/tr><tr><td>G2<\/td><td>Pending Activation<\/td><td><\/td><\/tr><tr><td>G3<\/td><td>Activated and Working<\/td><td><\/td><\/tr><tr><td>G4<\/td><td>Deactivated Request Received<\/td><td><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>THE ACTIVATION PROCEDURE CAN BE INITIATED BY THE TE OR THE NT.<br>THE DEACTIVATION CAN ONLY BE INITIATED BY THE NT.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Physical Interface<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">BRI S\/T Interface (RJ-45) Pinout<\/h4>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>RJ-45 Pin<\/strong><\/td><td><strong>TE<\/strong><\/td><td><strong>NT<\/strong><\/td><td><strong>Polarity<\/strong><\/td><\/tr><tr><td>3<\/td><td>Transmit +<\/td><td>Receive +<\/td><td>+<\/td><\/tr><tr><td>4<\/td><td>Receive +<\/td><td>Transmit +<\/td><td>+<\/td><\/tr><tr><td>5<\/td><td>Receive &#8211;<\/td><td>Transmit &#8211;<\/td><td>&#8211;<\/td><\/tr><tr><td>6<\/td><td>Transmit &#8211;<\/td><td>Receive &#8211;<\/td><td>&#8211;<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">BRI U Interface (RJ-45) Pinouts<\/h4>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Wire<\/strong><\/td><td><strong>NT (RJ-45)<\/strong><\/td><td><strong>LT(RJ-45)<\/strong><\/td><\/tr><tr><td>Tip<\/td><td>4<\/td><td>4<\/td><\/tr><tr><td>Ring<\/td><td>5<\/td><td>5<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u00a0Terminal Endpoint Identifier (TEI)\u00a0<\/h3>\n\n\n\n<p><a href=\"https:\/\/www.cisco.com\/c\/en\/us\/support\/docs\/dial-access\/integrated-services-digital-networks-isdn-channel-associated-signaling-cas\/12073-tei-negotiation.html\">https:\/\/www.cisco.com\/c\/en\/us\/support\/docs\/dial-access\/integrated-services-digital-networks-isdn-channel-associated-signaling-cas\/12073-tei-negotiation.html<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Layer 2 (Q.921)<\/h2>\n\n\n\n<p><a href=\"https:\/\/www.cisco.com\/c\/en\/us\/support\/docs\/dial-access\/integrated-services-digital-networks-isdn-channel-associated-signaling-cas\/5707-bri-layer2.html?referring_site=bodynav\">https:\/\/www.cisco.com\/c\/en\/us\/support\/docs\/dial-access\/integrated-services-digital-networks-isdn-channel-associated-signaling-cas\/5707-bri-layer2.html?referring_site=bodynav<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Layer 3 (Q.931)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Q.931 ISDN Cause Codes<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><th>Hex<\/th><th>Decimal<\/th><th>Cause<\/th><\/tr><tr><td>0x1<\/td><td>1<\/td><td>Unallocated or unassigned number<\/td><\/tr><tr><td>0x2<\/td><td>2<\/td><td>No route to specified transit network (Transit Network Identity)<\/td><\/tr><tr><td>0x3<\/td><td>3<\/td><td>No route to destination<\/td><\/tr><tr><td>0x4<\/td><td>4<\/td><td>Send special information tone<\/td><\/tr><tr><td>0x5<\/td><td>5<\/td><td>Misdialled trunk prefix<\/td><\/tr><tr><td>0x6<\/td><td>6<\/td><td>Channel unacceptable<\/td><\/tr><tr><td>0x7<\/td><td>7<\/td><td>Call awarded and being delivered in an established channel<\/td><\/tr><tr><td>0x8<\/td><td>8<\/td><td>Prefix 0 dialed but not allowed<\/td><\/tr><tr><td>0x9<\/td><td>9<\/td><td>Prefix 1 dialed but not allowed<\/td><\/tr><tr><td>0xA<\/td><td>10<\/td><td>Prefix 1 not dialed but required<\/td><\/tr><tr><td>0xB<\/td><td>11<\/td><td>More digits received than allowed, call is proceeding<\/td><\/tr><tr><td>0x10<\/td><td>16<\/td><td>Normal call clearing<\/td><\/tr><tr><td>0x11<\/td><td>17<\/td><td>User busy<\/td><\/tr><tr><td>0x12<\/td><td>18<\/td><td>No user responding<\/td><\/tr><tr><td>0x13<\/td><td>19<\/td><td>T.301 expired: &#8211; User Alerted, No answer from user<\/td><\/tr><tr><td>0x15<\/td><td>21<\/td><td>Call rejected<\/td><\/tr><tr><td>0x16<\/td><td>22<\/td><td>Number changed to number in diagnostic field.<\/td><\/tr><tr><td>0x17<\/td><td>23<\/td><td>Reverse charging rejected<\/td><\/tr><tr><td>0x18<\/td><td>24<\/td><td>Call suspended<\/td><\/tr><tr><td>0x19<\/td><td>25<\/td><td>Call resumed<\/td><\/tr><tr><td>0x1A<\/td><td>26<\/td><td>Non-selected user clearing<\/td><\/tr><tr><td>0x1B<\/td><td>27<\/td><td>Destination out of order<\/td><\/tr><tr><td>0x1C<\/td><td>28<\/td><td>Invalid number format or incomplete address<\/td><\/tr><tr><td>0x1D<\/td><td>29<\/td><td>EKTS facility rejected by network<\/td><\/tr><tr><td>0x1E<\/td><td>30<\/td><td>Response to STATUS ENQUIRY<\/td><\/tr><tr><td>0x1F<\/td><td>31<\/td><td>Normal, unspecified<\/td><\/tr><tr><td>0x21<\/td><td>33<\/td><td>Circuit out of order<\/td><\/tr><tr><td>0x22<\/td><td>34<\/td><td>No circuit\/channel available<\/td><\/tr><tr><td>0x23<\/td><td>35<\/td><td>Destination unattainable<\/td><\/tr><tr><td>0x24<\/td><td>36<\/td><td>Out of order<\/td><\/tr><tr><td>0x25<\/td><td>37<\/td><td>Degraded service<\/td><\/tr><tr><td>0x26<\/td><td>38<\/td><td>Network out of order<\/td><\/tr><tr><td>0x27<\/td><td>39<\/td><td>Transit delay range cannot be achieved<\/td><\/tr><tr><td>0x28<\/td><td>40<\/td><td>Throughput range cannot be achieved<\/td><\/tr><tr><td>0x29<\/td><td>41<\/td><td>Temporary failure<\/td><\/tr><tr><td>0x2A<\/td><td>42<\/td><td>Switching equipment congestion<\/td><\/tr><tr><td>0x2B<\/td><td>43<\/td><td>Access information discarded<\/td><\/tr><tr><td>0x2C<\/td><td>44<\/td><td>Requested circuit channel not available<\/td><\/tr><tr><td>0x2D<\/td><td>45<\/td><td>Preempted<\/td><\/tr><tr><td>0x2E<\/td><td>46<\/td><td>Precedence call blocked<\/td><\/tr><tr><td>0x2F<\/td><td>47<\/td><td>Resource unavailable, unspecified<\/td><\/tr><tr><td>0x31<\/td><td>49<\/td><td>Quality of service unavailable<\/td><\/tr><tr><td>0x32<\/td><td>50<\/td><td>Requested facility not subscribed<\/td><\/tr><tr><td>0x33<\/td><td>51<\/td><td>Reverse charging not allowed<\/td><\/tr><tr><td>0x34<\/td><td>52<\/td><td>Outgoing calls barred<\/td><\/tr><tr><td>0x35<\/td><td>53<\/td><td>Outgoing calls barred within CUG<\/td><\/tr><tr><td>0x36<\/td><td>54<\/td><td>Incoming calls barred<\/td><\/tr><tr><td>0x37<\/td><td>55<\/td><td>Incoming calls barred within CUG<\/td><\/tr><tr><td>0x38<\/td><td>56<\/td><td>Call waiting not subscribed<\/td><\/tr><tr><td>0x39<\/td><td>57<\/td><td>Bearer capability not authorized<\/td><\/tr><tr><td>0x3A<\/td><td>58<\/td><td>Bearer capability not presently available<\/td><\/tr><tr><td>0x3F<\/td><td>63<\/td><td>Service or option not available, unspecified<\/td><\/tr><tr><td>0x41<\/td><td>65<\/td><td>Bearer service not implemented<\/td><\/tr><tr><td>0x42<\/td><td>66<\/td><td>Channel type not implemented<\/td><\/tr><tr><td>0x43<\/td><td>67<\/td><td>Transit network selection not implemented<\/td><\/tr><tr><td>0x44<\/td><td>68<\/td><td>Message not implemented<\/td><\/tr><tr><td>0x45<\/td><td>69<\/td><td>Requested facility not implemented<\/td><\/tr><tr><td>0x46<\/td><td>70<\/td><td>Only restricted digital information bearer capability is available<\/td><\/tr><tr><td>0x4F<\/td><td>79<\/td><td>Service or option not implemented, unspecified<\/td><\/tr><tr><td>0x51<\/td><td>81<\/td><td>Invalid call reference value<\/td><\/tr><tr><td>0x52<\/td><td>82<\/td><td>Identified channel does not exist<\/td><\/tr><tr><td>0x53<\/td><td>83<\/td><td>A suspended call exists, but this call identity does not<\/td><\/tr><tr><td>0x54<\/td><td>84<\/td><td>Call identity in use<\/td><\/tr><tr><td>0x55<\/td><td>85<\/td><td>No call suspended<\/td><\/tr><tr><td>0x56<\/td><td>86<\/td><td>Call having the requested call identity has been cleared<\/td><\/tr><tr><td>0x57<\/td><td>87<\/td><td>Called user not member of CUG<\/td><\/tr><tr><td>0x58<\/td><td>88<\/td><td>Incompatible destination<\/td><\/tr><tr><td>0x59<\/td><td>89<\/td><td>Non-existent abbreviated address entry<\/td><\/tr><tr><td>0x5A<\/td><td>90<\/td><td>Destination address missing, and direct call not subscribed<\/td><\/tr><tr><td>0x5B<\/td><td>91<\/td><td>Invalid transit network selection (national use)<\/td><\/tr><tr><td>0x5C<\/td><td>92<\/td><td>Invalid facility parameter 93 Mandatory information element is missing<\/td><\/tr><tr><td>0x5D<\/td><td>93<\/td><td>Message type non-existent or not implemented<\/td><\/tr><tr><td>0x5F<\/td><td>95<\/td><td>Invalid message, unspecified<\/td><\/tr><tr><td>0x60<\/td><td>96<\/td><td>Mandatory information element is missing<\/td><\/tr><tr><td>0x61<\/td><td>97<\/td><td>Message type non-existent or not implemented<\/td><\/tr><tr><td>0x62<\/td><td>98<\/td><td>Message not compatible with call state or message type non-existent or not implemented<\/td><\/tr><tr><td>0x63<\/td><td>99<\/td><td>Information element nonexistent or not implemented<\/td><\/tr><tr><td>0x64<\/td><td>100<\/td><td>Invalid information element contents<\/td><\/tr><tr><td>0x65<\/td><td>101<\/td><td>Message not compatible with call state<\/td><\/tr><tr><td>0x66<\/td><td>102<\/td><td>Recovery on timer expiry<\/td><\/tr><tr><td>0x67<\/td><td>103<\/td><td>Parameter non-existent or not implemented &#8211; passed on<\/td><\/tr><tr><td>0x6F<\/td><td>111<\/td><td>Protocol error, unspecified<\/td><\/tr><tr><td>0x7F<\/td><td>127<\/td><td>Internetworking, unspecified<\/td><\/tr><tr><td>0x80+<\/td><td>128 orhigher<\/td><td>Proprietary diagnostic code (not necessarily bad). Typically used to pass proprietary control or maintenance messages between multiplexers.<br>&nbsp;<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>https:\/\/www.cisco.com\/c\/en\/us\/td\/docs\/ios\/dial\/configuration\/guide\/12_2sr\/dia_12_2sr_book\/dia_cfg_isdn_bri.html https:\/\/www.cisco.com\/c\/en\/us\/support\/docs\/dial-access\/integrated-services-digital-networks-isdn-channel-associated-signaling-cas\/22802-bri-loopback-call.html https:\/\/www.cisco.com\/c\/en\/us\/support\/docs\/voice\/digital-ccs\/15415-bri-voice-port-cfg.html Telstra Exit Date The final exit date for ISDN in all areas nationwide is 31 May 2022. Interfaces U S\/T S T R NT1 NT2 TA TE B\/D Channels 2 x 64kbps (B) channels 1 x 16kbps (D) channel Protocols Q.921 describes data-link LAPD Q.931 describes network layer TE startup sequence Line [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-container-style":"default","site-container-layout":"default","site-sidebar-layout":"default","disable-article-header":"default","disable-site-header":"default","disable-site-footer":"default","disable-content-area-spacing":"default","footnotes":""},"categories":[31],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/posts\/1317"}],"collection":[{"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1317"}],"version-history":[{"count":24,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/posts\/1317\/revisions"}],"predecessor-version":[{"id":1349,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/posts\/1317\/revisions\/1349"}],"wp:attachment":[{"href":"https:\/\/blog.hegars.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1317"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1317"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1317"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}