Dear All, I have a problem during call setup. I am using asterisk with libss7 (trunk). It was working with my current configuration. Now it is not working when I enabled the debugging I found that my box is sending REL message instead of ACM as soon as an IAM message arrive. The following message appears on the console when I try to place a call. [Dec 16 22:59:42] NOTICE[30985]: chan_zap.c:9200 ss7_linkset: Received RLC out and we haven't sent REL. Ignoring. The following is the output of the debugging which shows that my box is sending REL. I don't really know what is the reason for sending this message. My point code is 1085 and the other side point code is 2132 <[0] MSU [ 8f 9e 21 ] Network Indicator: 2 Priority: 0 User Part: ISUP (5) [ 85 ] OPC 2132 DPC 1085 SLS 3 [ 3d 04 15 32 ] 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: included (1) [ 10 ] 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 non-ISDN (0) SCCP Method Ind: no indication (0) [ 60 00 ] Calling Party Category: Category: Ordinary calling subscriber (10) [ 0a ] Transmission Medium Requirements: N x 64kbit/s unrestricted or possibly spare (3) [ 03 ] --VARIABLE LENGTH PARMS[1]-- Called Party Number: Nature of address: 1 NI: 0 Numbering plan: 1 Address signals: 27558929# [ 07 81 10 72 55 98 92 0f ] --OPTIONAL PARMS-- Calling Party Number: Nature of address: 3 NI: 0 Numbering plan: 1 Presentation: 0 Screening: 3 Address signals: 932336449 [ 0a 07 83 13 39 32 63 44 09 ] Len = 16 [ 9e 90 0d 85 54 48 0f 31 03 00 0c 02 00 02 81 90 ] FSN: 16 FIB 1 BSN: 30 BIB 1 >[0] MSU [ 9e 90 0d ] Network Indicator: 2 Priority: 0 User Part: ISUP (5) [ 85 ] OPC 1085 DPC 2132 SLS 3 [ 54 48 0f 31 ] CIC: 3 [ 03 00 ] Message Type: REL [ 0c ] --VARIABLE LENGTH PARMS[1]-- Cause Indicator: Coding Standard: 0 Location: 1 Cause Class: 1 Cause Subclass: 0 Cause: Normal call clearing (16) [ 02 81 90 ] Len = 12 [ 90 9f 09 85 3d 04 15 32 03 00 10 00 ] FSN: 31 FIB 1 BSN: 16 BIB 1 <[0] MSU [ 90 9f 09 ] Network Indicator: 2 Priority: 0 User Part: ISUP (5) [ 85 ] OPC 2132 DPC 1085 SLS 3 [ 3d 04 15 32 ] CIC: 3 [ 03 00 ] Message Type: RLC [ 10 ] Here is my zapata.conf: [channels] context=default ; Signaling type SS7 signalling = ss7 ; Variant of SS7 signaling: ; Options are itu and ansi ss7type = itu ; All settings apply to linkset 1 linkset = 1 ; Point code of the linkset pointcode = 1085 ; Point code of node adjacent to this signaling link ; (Possibly the STP between you and your destination) adjpointcode = 2132 ; Default point code that you would like to assign to ; outgoing messages (in case of routing through STPs, ; or using A links) defaultdpc = 2132 ; What the MTP3 network indicator bits should be set to. ; Choices are national, national_spare, international, ; international_spare networkindicator=national ; First signaling channel sigchan = 1 ; Begin CIC (Circuit indication codes) count with this number cicbeginswith = 2 ; Channels to associate with CICs on this linkset channel = 2-31 ; another cicbeginwith, so channel 16 is used for signalling Here is My zaptel.conf : # Autogenerated by /usr/sbin/genzaptelconf -- do not hand edit # Zaptel Configuration File # # This file is parsed by the Zaptel Configurator, ztcfg # # It must be in the module loading order # Span 1: WCT1/0 "Digium Wildcard TE110P T1/E1 Card 0" span=1,1,0,ccs,hdb3 # termtype: te bchan=2-31 dchan=1 # Global data loadzone = us defaultzone = us Any help will be appreciated.