Folks, Thanks for your help. I've now got it working. It was a combination of a number of thinks including CRC4 on when it needed to be off as well as incorrectly configuring the timing source. The following config files follow for reference for others: * /etc/zaptel.conf * /etc/wanpipe/wanpipe1.conf * /etc/asterisk/ss7.conf * /etc/asterisk/extensions.conf I'll be configuring multiple linksets and hopefully also PRI ports on the same card. I may post those later in the week when working or just drop me a mail if I don't. - Barry ################################################################## ###### /etc/zaptel.conf ################################################################## loadzone=us defaultzone=us #Sangoma A108 port 1 [slot:4 bus:13 span:1] <wanpipe1> span=1,1,0,ccs,hdb3 bchan=1-31 ################################################################## ###### /etc/wanpipe/wanpipe1.conf ################################################################## [devices] wanpipe1 = WAN_AFT_TE1, Comment [interfaces] w1g1 = wanpipe1, , TDM_VOICE, Comment [wanpipe1] CARD_TYPE = AFT S514CPU = A CommPort = PRI AUTO_PCISLOT = NO PCISLOT = 4 PCIBUS = 13 FE_MEDIA = E1 FE_LCODE = HDB3 FE_FRAME = NCRC4 FE_LINE = 1 TE_CLOCK = NORMAL TE_REF_CLOCK = 0 TE_SIG_MODE = CCS TE_HIGHIMPEDANCE = NO LBO = 120OH FE_TXTRISTATE = NO MTU = 1500 UDPPORT = 9000 TTL = 255 IGNORE_FRONT_END = NO TDMV_SPAN = 1 TDMV_DCHAN = 0 TDMV_HW_DTMF = NO ACTIVE_CH = ALL [w1g1] ACTIVE_CH = ALL TDMV_ECHO_OFF = NO TDMV_HWEC = NO ################################################################## ###### /etc/asterisk/ss7.conf ################################################################## [linkset-siuc] enabled => yes enable_st => yes use_connect => yes hunting_policy => seq_lth context => ss7 language => en t35 => 15000,timeout subservice => national [link-l1] linkset => siuc channels => 1-15,17-31 schannel => 16 firstcic => 1 enabled => yes echocancel => no echocan_train => 350 echocan_taps => 128 [host-HostA] enabled => yes opc => 0x1 dpc => siuc:0x35A0 links => l1:1 ; Barry: I don't know what this is: globaltitle => 0x00, 0x04, 0x01, 4546931411 ssn => 7 ################################################################## ###### /etc/asterisk/extensions.conf ################################################################## [ss7] ; When a call comes in, just dial a local landline for testing: exten => s,1,Dial(ss7/siuc/011234567) -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-ss7/attachments/20080426/5df4a463/attachment.htm