<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I'm trying to get this lab ISDN configuration up and running but I am having ISDN problems. I have two 2811 routers each with a VWIC 2MFT-T1 and a T1 crossover cable connecting them. They won't move from TEI_ASSIGNED to MULTIPLE_FRAME_ESTABLISHED. I know my T1 cable is good. <div><br></div><div><div># debug isdn q921</div><div><br></div><div><div>Dec 4 20:57:58.250: ISDN Se0/0/0:23 Q921: User RX <- BAD FRAME(0x00017F)</div><div>Dec 4 20:57:59.250: ISDN Se0/0/0:23 Q921: User RX <- BAD FRAME(0x00017F)</div><div>Dec 4 20:58:00.250: ISDN Se0/0/0:23 Q921: User RX <- BAD FRAME(0x00017F)</div><div><br></div><div><br></div><div># show isdn status</div><div><br></div><div><div>Global ISDN Switchtype = primary-ni</div><div><br></div><div>%Q.931 is backhauled to CCM MANAGER 0x0003 on DSL 0. Layer 3 output may not apply</div><div><br></div><div>ISDN Serial0/0/0:23 interface</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>dsl 0, interface ISDN Switchtype = primary-ni</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>L2 Protocol = Q.921 0x0000 L3 Protocol(s) = CCM MANAGER 0x0003 </div><div> Layer 1 Status:</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>ACTIVE</div><div> Layer 2 Status:</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>TEI = 0, Ces = 1, SAPI = 0, State = <b>TEI_ASSIGNED</b></div><div><br></div></div><div><br></div><div># show run | sec controller</div><div><div>controller T1 0/0/0</div><div> framing esf</div><div> linecode b8zs</div><div> cablelength short 133</div><div> pri-group timeslots 1-3,24 service mgcp</div><div> description PRI</div><div><div><br></div><div># show run | sec Serial</div><div>interface Serial0/0/0:23</div><div> description PRI</div><div> no ip address</div><div> encapsulation hdlc</div><div> isdn switch-type primary-ni</div><div> isdn incoming-voice voice</div><div> isdn bind-l3 ccm-manager</div><div> no cdp enable</div><div><br></div><div><br></div><div>The "PSTN" router</div><div><br></div><div><div>controller T1 0/0/0</div><div> clock source internal</div><div> cablelength short 133</div><div> pri-group timeslots 1-3,24</div><div> description PRI</div><div><br></div><div><div>interface Serial0/2/0:23</div><div> description PRI</div><div> no ip address</div><div> encapsulation hdlc</div><div> isdn switch-type primary-ni</div><div> isdn incoming-voice voice</div><div> isdn bchan-number-order ascending </div><div> no cdp enable</div><div><br></div><div><div>PSTN#deb isdn q921</div><div>debug isdn q921 is<span class="Apple-tab-span" style="white-space:pre"> </span>ON.</div><div>PSTN#term mon</div><div>PSTN#</div><div>Dec 4 21:54:51.090: ISDN Se0/0/0:23 Q921: Net TX -> SABMEp sapi=0 tei=0</div><div>Dec 4 21:54:55.590: ISDN Se0/2/0:23 Q921: L2_EstablishDataLink: sending SABME</div><div>Dec 4 21:54:55.590: ISDN Se0/2/0:23 Q921: User TX -> SABMEp sapi=0 tei=0</div><div>Dec 4 21:54:56.590: ISDN Se0/2/0:23 Q921: User TX -> SABMEp sapi=0 tei=0</div><div>Dec 4 21:54:57.090: ISDN Se0/0/0:23 Q921: L2_EstablishDataLink: sending SABME</div><div>Dec 4 21:54:57.090: ISDN Se0/0/0:23 Q921: Net TX -> SABMEp sapi=0 tei=0</div><div>Dec 4 21:54:57.590: ISDN Se0/2/0:23 Q921: User TX -> SABMEp sapi=0 tei=0</div><div>Dec 4 21:54:58.090: ISDN Se0/0/0:23 Q921: Net TX -> SABMEp sapi=0 tei=0</div><div><br></div><div><br></div></div><div><br></div></div></div></div></div></div></div></body></html>