Hi All, I am using E1 Digium card installed on a CentOS 5 machine with the latest stable versions of asterisk and zaptel. I have tested the same link with libss7 an it is working perfectly. As I am highly interested in the new clustering features in chan_ss7-1.0. I have installed it without any problem and the link is now showing that it is inservice. ss7 link status linkset siuc, link |1, schannel 1, sls 0, INSERVICE, rx: 5, tx: 2/3, sentseq/lastack: 29/29, total 3393504, 3393600 I found that the provider is not responding to the GRS messages. and show linestat is showing: localhost*CLI> ss7 linestat Linkset: siuc> CIC 3 Idle Reset pending CIC 4 Idle Reset pending CIC 5 Idle Reset pending CIC 6 Idle Reset pending CIC 7 Idle Reset pending CIC 8 Idle Reset pending CIC 9 Idle Reset pending CIC 10 Idle Reset pending CIC 11 Idle Reset pending CIC 12 Idle Reset pending CIC 13 Idle Reset pending CIC 14 Idle Reset pending CIC 15 Idle Reset pending CIC 16 Idle Reset pending CIC 17 Idle Reset pending CIC 18 Idle Reset pending CIC 19 Idle Reset pending CIC 20 Idle Reset pending CIC 21 Idle Reset pending CIC 22 Idle Reset pending CIC 23 Idle Reset pending CIC 24 Idle Reset pending CIC 25 Idle Reset pending CIC 26 Idle Reset pending CIC 27 Idle Reset pending CIC 28 Idle Reset pending CIC 29 Idle Reset pending CIC 30 Idle Reset pending CIC 31 Idle Reset pending CIC 32 Idle Reset pending I think there is no problem with the GRS issue. However when I try to call to my system from outside I got the following message on the console without the channel being answered although I am handing any incoming call to any extension. [Dec 11 02:32:34] NOTICE[12554]: isup.c:489 decode_isup_phonenum: National (significant) or unknown nature of address indicator (1), assuming international. when I opened the source code of isup.c I found that this has something to do with the phone number format. I can send a pcap file as an output from the ss7 dump if needed. Any help will be highly appreciated. ================================= Mostafa Ibrahim Security Department Manager ValueSyS website: http://www.valuesys.net Tel: +202 22682552 +202 2682887 Fax: +202 22674346 Mobile: +2 0181008194 Email: mostafa.ibrahim at valuesys.net =================================