*Dec  7 11:54:25.997: ISDN BR0/0/1 Q921: L2_EstablishDataLink: sending SABME
*Dec  7 11:54:25.997: ISDN BR0/0/1 Q921: Net TX -> IDCKRQ ri=0 ai=63
*Dec  7 11:54:25.997: ISDN BR0/0/1 Q921: Net TX -> SABMEp sapi=0 tei=0
*Dec  7 11:54:26.017: ISDN BR0/0/1 Q921: Net RX <- BAD FRAME(0x000173)
*Dec  7 11:54:26.997: ISDN BR0/0/1 Q921: Net TX -> SABMEp sapi=0 tei=63
*Dec  7 11:54:26.997: ISDN BR0/0/1 Q921: Net TX -> IDCKRQ ri=0 ai=63
*Dec  7 11:54:27.005: ISDN BR0/0/1 Q921: Net RX <- UAf sapi=0 tei=0
*Dec  7 11:54:27.005: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/0/1, TEI 0 changed to up
*Dec  7 11:54:28.093: ISDN BR0/0/1 Q921: Net RX <- BAD FRAME(0x020153)
*Dec  7 11:54:28.097: ISDN BR0/0/1 Q921: L2_EstablishDataLink: sending SABME
*Dec  7 11:54:28.097: ISDN BR0/0/1 Q921: Net TX -> SABMEp sapi=0 tei=0
*Dec  7 11:54:28.105: ISDN BR0/0/1 Q921: Net RX <- BAD FRAME(0x00011F)
*Dec  7 11:54:29.093: ISDN BR0/0/1 Q921: Net RX <- BAD FRAME(0x020153)
*Dec  7 11:54:29.097: ISDN BR0/0/1 Q921: Net TX -> SABMEp sapi=0 tei=63
*Dec  7 11:54:29.105: ISDN BR0/0/1 Q921: Net RX <- BAD FRAME(0x00011F)
*Dec  7 11:54:30.093: ISDN BR0/0/1 Q921: Net RX <- BAD FRAME(0x020153)
*Dec  7 11:54:30.097: ISDN BR0/0/1 Q921: Net TX -> SABMEp sapi=0 tei=63
*Dec  7 11:54:30.105: ISDN BR0/0/1 Q921: Net RX <- BAD FRAME(0x00011F)
*Dec  7 11:54:31.093: ISDN BR0/0/1 Q921: Net RX <- BAD FRAME(0x020153)
*Dec  7 11:54:31.097: ISDN BR0/0/1 Q921: Net TX -> SABMEp sapi=0 tei=63
*Dec  7 11:54:31.105: ISDN BR0/0/1 Q921: Net RX <- BAD FRAME(0x00011F)
*Dec  7 11:54:32.097: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0/0/1, TEI 63 changed to down
*Dec  7 11:54:32.097: ISDN BR0/0/1 Q921: L2_EstablishDataLink: sending SABME
*Dec  7 11:54:32.097: ISDN BR0/0/1 Q921: Net TX -> IDCKRQ ri=0 ai=63
*Dec  7 11:54:32.097: ISDN BR0/0/1 Q921: Net TX -> SABMEp sapi=0 tei=0
*Dec  7 11:54:32.117: ISDN BR0/0/1 Q921: Net RX <- BAD FRAME(0x000173)
*Dec  7 11:54:33.097: ISDN BR0/0/1 Q921: Net TX -> SABMEp sapi=0 tei=63
*Dec  7 11:54:33.097: ISDN BR0/0/1 Q921: Net TX -> IDCKRQ ri=0 ai=63
*Dec  7 11:54:33.105: ISDN BR0/0/1 Q921: Net RX <- UAf sapi=0 tei=0
*Dec  7 11:54:33.105: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/0/1, TEI 0 changed to up

... etc ...