Hi, I havent seen any useful information while loading and unloading chat_dahdi.so, however, I have attached below the output of ss7linktest and a debug during a call. By the way, what does it mean when RX is 0 (asterisk not receiving anything from the telco?) Thanks Tim ------------ ed channel 31, SS7 signalling -- Automatically generated pseudo channel == Starting SS7 linkset on span 1 == Registered channel type 'DAHDI' (DAHDI Telephony Driver w/SS7) Loaded chan_dahdi.so *CLI> == Manager registered action DAHDITransfer == Manager registered action DAHDIHangup == Manager registered action DAHDIDialOffhook == Manager registered action DAHDIDNDon == Manager registered action DAHDIDNDoff == Manager registered action DAHDIShowChannels == Manager registered action DAHDIRestart Loaded chan_dahdi.so => (DAHDI Telephony w/SS7) Huh?! Got FISU in link state 1 MTP2 link up (SLC 0) --- SS7 Up --- Resetting CICs 2 to 31 Got reset acknowledgement from CIC 2 to 31. *CLI> ss7 block debug no show unblock *CLI> ss7 block debug no show unblock *CLI> ss7 debug linkset 1 Enabled debugging on linkset 1 *CLI> == Using SIP RTP CoS mark 5 -- Executing [074892062 at sip:1] NoOp("SIP/100-00000000", "") in new stack -- Executing [074892062 at sip:2] Dial("SIP/100-00000000", "DAHDI/3/074892062") in new stack Len = 36 [ 83 85 21 85 f1 47 fa 31 03 00 01 00 60 01 0a 00 02 09 07 03 10 80 79 24 60 f2 0a 07 03 11 70 09 97 10 99 00 ] FSN: 5 FIB 1 BSN: 3 BIB 1 >[0] MSU [ 83 85 21 ] Network Indicator: 2 Priority: 0 User Part: ISUP (5) [ 85 ] OPC 25 DPC 33 SLS 3 [ f1 47 fa 31 ] CIC: 3 [ 03 00 ] Message Type: IAM [ 01 ] --FIXED LENGTH PARMS[4]-- Nature of Connection Indicator: Satellites in connection: 0 Continuity Check: Check not required (0) Outgoing half echo control device: not included (0) [ 00 ] Forward Call Indicators: Nat/Intl Call Ind: call to be treated as a national call (0) End to End Method Ind: no end-to-end method(s) available (0) Interworking Ind: no interworking encountered (0) End to End Info Ind: no end-to-end information available (0) ISDN User Part Ind: ISDN user part used all the way (1) ISDN User Part Pref Ind: ISDN user part not preferred all the way (1) ISDN Access Ind: originating access ISDN (1) SCCP Method Ind: no indication (0) [ 60 01 ] Calling Party's Category: Category: Ordinary calling subscriber (10) [ 0a ] Transmission Medium Requirements: Speech (0) [ 00 ] --VARIABLE LENGTH PARMS[1]-- Called Party Number: Nature of address: 3 NI: 0 Numbering plan: 1 Address signals: 074892062# [ 07 03 10 80 79 24 60 f2 ] --OPTIONAL PARMS-- Calling Party Number: Nature of address: 3 NI: 0 Numbering plan: 1 Presentation: 0 Screening: 1 Address signals: 0790790199 [ 0a 07 03 11 70 09 97 10 99 ] Len = 3 [ 83 85 00 ] FSN: 5 FIB 1 BSN: 3 BIB 1 >[0] FISU -- Called 3/074892062 Len = 14 [ 85 84 0b 85 e9 47 fc 11 03 00 06 16 34 00 ] FSN: 4 FIB 1 BSN: 5 BIB 1 <[0] MSU [ 85 84 0b ] Network Indicator: 2 Priority: 0 User Part: ISUP (5) [ 85 ] OPC 33 DPC 25 SLS 1 [ e9 47 fc 11 ] CIC: 3 [ 03 00 ] Message Type: ACM [ 06 ] --FIXED LENGTH PARMS[1]-- Backward Call Indicator: Charge indicator: 2 Called party's status indicator: 1 Called party's category indicator: 1 End to End method indicator: 0 Interworking indicator: 0 End to End information indicator: 0 ISDN user part indicator: 1 Holding indicator: 0 ISDN access indicator: 1 Echo control device indicator: 1 SCCP method indicator: 0 [ 16 34 ] -- DAHDI/3-1 is proceeding passing it to SIP/100-00000000 -- DAHDI/3-1 is ringing Len = 17 [ 85 85 0e 85 e9 47 fc 11 03 00 09 01 11 02 16 34 00 ] FSN: 5 FIB 1 BSN: 5 BIB 1 <[0] MSU [ 85 85 0e ] Network Indicator: 2 Priority: 0 User Part: ISUP (5) [ 85 ] OPC 33 DPC 25 SLS 1 [ e9 47 fc 11 ] CIC: 3 [ 03 00 ] Message Type: ANM [ 09 ] --OPTIONAL PARMS-- Backward Call Indicator: Charge indicator: 2 Called party's status indicator: 1 Called party's category indicator: 1 End to End method indicator: 0 Interworking indicator: 0 End to End information indicator: 0 ISDN user part indicator: 1 Holding indicator: 0 ISDN access indicator: 1 Echo control device indicator: 1 SCCP method indicator: 0 [ 11 02 16 34 ] [Nov 29 10:33:40] WARNING[7001]: chan_dahdi.c:2005 dahdi_enable_ec: Unable to enable echo cancellation on channel 3 (No such device) -- DAHDI/3-1 answered SIP/100-00000000 Len = 16 [ 85 86 0d 85 e9 47 fc 11 03 00 0c 02 00 02 80 90 ] FSN: 6 FIB 1 BSN: 5 BIB 1 <[0] MSU [ 85 86 0d ] Network Indicator: 2 Priority: 0 User Part: ISUP (5) [ 85 ] OPC 33 DPC 25 SLS 1 [ e9 47 fc 11 ] CIC: 3 [ 03 00 ] Message Type: REL [ 0c ] --VARIABLE LENGTH PARMS[1]-- Cause Indicator: Coding Standard: 0 Location: 0 Cause Class: 1 Cause Subclass: 0 Cause: Normal call clearing (16) [ 02 80 90 ] Len = 12 [ 86 86 09 85 f1 47 fa 31 03 00 10 00 ] FSN: 6 FIB 1 BSN: 6 BIB 1 >[0] MSU [ 86 86 09 ] Network Indicator: 2 Priority: 0 User Part: ISUP (5) [ 85 ] OPC 25 DPC 33 SLS 3 [ f1 47 fa 31 ] CIC: 3 [ 03 00 ] Message Type: RLC [ 10 ] -- Hungup 'DAHDI/3-1' == Spawn extension (sip, 074892062, 2) exited non-zero on 'SIP/100-00000000' ---------------------------------- [root at ivr1 libss7]# ./ss7linktest 1 itu 33 25 Starting link 1 Link state change: IDLE -> NOTALIGNED Len = 4 [ ff ff 01 00 ] FSN: 127 FIB 1 BSN: 127 BIB 1 >[0] LSSU SIO Len = 4 [ ff ff 01 00 ] FSN: 127 FIB 1 BSN: 127 BIB 1 <[0] LSSU SIO Link state change: NOTALIGNED -> ALIGNED Len = 4 [ ff ff 01 02 ] FSN: 127 FIB 1 BSN: 127 BIB 1 >[0] LSSU SIE Len = 4 [ ff ff 01 02 ] FSN: 127 FIB 1 BSN: 127 BIB 1 <[0] LSSU SIE Link state change: ALIGNED -> PROVING T4 expired! Link state change: PROVING -> ALIGNEDREADY Len = 3 [ ff ff 00 ] FSN: 127 FIB 1 BSN: 127 BIB 1 >[0] FISU Len = 3 [ ff ff 00 ] FSN: 127 FIB 1 BSN: 127 BIB 1 <[0] FISU Link state change: ALIGNEDREADY -> INSERVICE [0] MTP2 link up Len = 9 [ ff 80 06 80 e9 47 fc 01 17 ] FSN: 0 FIB 1 BSN: 127 BIB 1 >[0] MSU [ ff 80 06 ] Network Indicator: 2 Priority: 0 User Part: NET_MNG (0) [ 80 ] OPC 33 DPC 25 SLS 0 [ e9 47 fc 01 ] H0: 7 H1: 1 Message type: TRA [ 17 ] Len = 20 [ ff 81 11 81 e9 47 fc 01 11 a0 32 35 36 34 32 38 36 32 38 38 ] FSN: 1 FIB 1 BSN: 127 BIB 1 >[0] MSU [ ff 81 11 ] Network Indicator: 2 Priority: 0 User Part: STD_TEST (1) [ 81 ] OPC 33 DPC 25 SLS 0 [ e9 47 fc 01 ] H0: 1 H1: 1 [ 11 ] Len = 20 [ 81 80 11 81 e9 47 fc 01 11 a0 aa aa aa aa aa aa aa aa aa aa ] FSN: 0 FIB 1 BSN: 1 BIB 1 <[0] MSU [ 81 80 11 ] Network Indicator: 2 Priority: 0 User Part: STD_TEST (1) [ 81 ] OPC 33 DPC 25 SLS 0 [ e9 47 fc 01 ] H0: 1 H1: 1 [ 11 ] Received message destined for point code 0x7e9 but we're 0x7f1. Dropping ^C