We have an installation which drops the L2 on BRI voice connection. The connection is to Telkom and we can establish a call and talk but after the call is dropped, L2 drops and the port is left without multi-frame established. The following is an ISDN q931 debug of an outgoing call. The BRI config is below, at present its MGCP but we have also been testing with H323. From the debug 'Ux_DLRelInd: DL_REL_IND received from L2' seems to drop L2, it only comes back from a shut or Clear command. Does anyone know of an ISDN command which will reset the L2 after a call or keep it up.
Just for interest I tried switch-type Basic-ni, this does a reset after the L2 goes down and works without going calls, but on incomming calls I get Incompatible Destination and the call does not establish, L2 stays up.
Oct 13 12:56:48: ISDN BR0/3/1 Q931: Applying typeplan for sw-type 0x1 is 0x0 0x0, Calling num 36565 *Oct 13 12:56:48: ISDN BR0/3/1 Q931: Applying typeplan for sw-type 0x1 is 0x0 0x0, Called num 0824547562 *Oct 13 12:56:48: ISDN BR0/3/1 Q931: TX -> SETUP pd = 8 callref = 0x07 Bearer Capability i = 0x8090A3 Standard = CCITT Transfer Capability = Speech Transfer Mode = Circuit Transfer Rate = 64 kbit/s Channel ID i = 0x81 Preferred, B1 Progress Ind i = 0x8183 - Origination address is non-ISDN Display i = 'VOIP TEST VAUGHAN' Calling Party Number i = 0x0081, '36565' Plan:Unknown, Type:Unknown Called Party Number i = 0x80, '0824547562' Plan:Unknown, Type:Unknown Sending Complete *Oct 13 12:56:49: ISDN BR0/3/1 Q931: RX <- CALL_PROC pd = 8 callref = 0x87 Channel ID i = 0x89 Exclusive, B1 *Oct 13 12:56:54: ISDN BR0/3/1 Q931: RX <- ALERTING pd = 8 callref = 0x87 *Oct 13 12:56:56: ISDN BR0/3/1 Q931: RX <- CONNECT pd = 8 callref = 0x87 Date/Time i = 0x0A0A0D0F2F00 Date (dd-mm-yr) = 10-10-13 Time (hr:mnt:sec) = 15:47:00 *Oct 13 12:56:56: %ISDN-6-CONNECT: Interface BRI0/3/1:1 is now connected to 0824547562 N/A *Oct 13 12:56:56: ISDN BR0/3/1 Q931: TX -> CONNECT_ACK pd = 8 callref = 0x07 *Oct 13 12:56:59: ISDN BR0/3/1 Q931: RX <- DISCONNECT pd = 8 callref = 0x87 Cause i = 0x8090 - Normal call clearing Progress Ind i = 0x8288 - In-band info or appropriate now available *Oct 13 12:56:59: %ISDN-6-CONNECT: Interface BRI0/3/1:1 is now connected to 0824547562 N/A *Oct 13 12:56:59: %ISDN-6-DISCONNECT: Interface BRI0/3/1:1 disconnected from 0824547562 , call lasted 3 seconds *Oct 13 12:57:01: ISDN BR0/3/1 Q931: TX -> RELEASE pd = 8 callref = 0x07 *Oct 13 12:57:01: ISDN BR0/3/1 Q931: RX <- RELEASE_COMP pd = 8 callref = 0x87 *Oct 13 12:57:03: %ISDN-3-LAYER2_DOWN: Layer 2 for Interface BR0/3/1, TEI 104 changed to down *Oct 13 12:57:03: ISDN BR0/3/1 Q931: Ux_DLRelInd: DL_REL_IND received from L2
interface BRI0/3/1 description ###Telkom - BRI-7### no ip address isdn switch-type basic-net3 isdn overlap-receiving isdn point-to-point-setup isdn incoming-voice voice isdn bind-l3 ccm-manager service mgcp isdn send-alerting isdn sending-complete isdn static-tei 0 no isdn spoofing
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