Hi, I'm trying to establish an ISDN call between Switzerland and New-York. The destination is in New-York, ISDN line provided by Verizon. The called is disconnected just after being set up (see NY-router log below), and the problem seems to be that Verizon switch does not understand the callref flag (0x01 and 0x81) correctly. The funny thing is that i have another router in NY, another ISDN line from Verizon, and i'm calling from the same number in CH and it works perfectly... Does anyone have a hint for me ? Thanks André Oct 31 14:23:56.350 MET: ISDN BR0/0: RX <- SETUP pd = 8 callref = 0x01 Oct 31 14:23:56.350 MET: Bearer Capability i = 0x8890 Oct 31 14:23:56.350 MET: Channel ID i = 0x89 Oct 31 14:23:56.350 MET: Signal i = 0x40 - Alerting on - pattern 0 Oct 31 14:23:56.350 MET: Calling Party Number i = 0x1183, '<calling number removed>' Oct 31 14:23:56.354 MET: Called Party Number i = 0xC1, '<called number removed>' Oct 31 14:23:56.354 MET: Locking Shift to Codeset 5 Oct 31 14:23:56.354 MET: Codeset 5 IE 0x2A i = 0x808B0B, '<calling number removed>', 0x800109800114800114800114 Oct 31 14:23:56.358 MET: ISDN BR0/0: Incoming call id = 0x9E, dsl 0 Oct 31 14:23:56.358 MET: ISDN BR0/0: received HOST_INCOMING_CALL call_id 0x9E Oct 31 14:23:56.358 MET: ISDN BR0/0: HOST_INCOMING_CALL: voice_answer_data = FALSE Oct 31 14:23:56.358 MET: ISDN BR0/0: Event: Received a DATA call from <calling number removed> on B1 at 64 Kb/s Oct 31 14:23:56.358 MET: ISDN BR0/0: RM returned call_type 0 resource type 0 Oct 31 14:23:56.362 MET: ISDN BR0/0: TX -> CALL_PROC pd = 8 callref = 0x81 Oct 31 14:23:56.362 MET: Channel ID i = 0x89 Oct 31 14:23:56.362 MET: ISDN BR0/0: isdn_send_connect(): msg 4, call id 0x9E, ces 1 bchan 0, call type DATA Oct 31 14:23:56.366 MET: %LINK-3-UPDOWN: Interface BRI0/0:1, changed state to up Oct 31 14:23:56.370 MET: %ISDN-6-CONNECT: Interface BRI0/0:1 is now connected to <calling number removed> Oct 31 14:23:56.462 MET: ISDN BR0/0: RX <- RELEASE_COMP pd = 8 callref = 0x01 Oct 31 14:23:56.462 MET: Cause i = 0x82D1 - Invalid call reference value Oct 31 14:23:56.466 MET: ISDN BR0/0: received HOST_DISCONNECT_ACK call_id 0x9E Oct 31 14:23:56.466 MET: ISDN BR0/0: HOST_DISCONNECT_ACK: call type is DATA Oct 31 14:23:56.466 MET: %LINK-3-UPDOWN: Interface BRI0/0:1, changed state to down Oct 31 14:23:56.666 MET: CC: dsl 0 No CCB Src->HOST cid 0x9E, ev 0x4 ces 1 Oct 31 14:23:56.666 MET: ISDN BR0/0: received HOST_QUERY_RESPONSE call_id 0x9E --------------------- Andre Chapuis IP+ Engineering Swisscom Ltd Genfergasse 14 3050 Bern +41 31 893 89 61 chapuis@ip-plus.net CCIE #6023 ----------------------