Hi, I am new to PJSIP and I have modified the simplesua sample program to include registration. But I always get : SIP Registration failed, status=503 (service unavailable) I am using asterisk server as my SIP proxy. //listening SIP address/port char contact_char[256]; sprintf(contact_char,"sip:"SIP_USER"@192.168.xxx.xxx:5060"); contact = pj_str(contact_char); acc=&acc_var; //Initialize acc.cfg acc->cfg.id = pj_str("sip:" SIP_USER "@" SIP_DOMAIN); acc->cfg.reg_uri = pj_str("sip:" SIP_DOMAIN); acc->cfg.cred_count = 1; acc->cfg.cred_info[0].realm = pj_str("*"); acc->cfg.cred_info[0].scheme = pj_str("digest"); acc->cfg.cred_info[0].username = pj_str(SIP_USER "@" SIP_DOMAIN); acc->cfg.cred_info[0].data_type = 0;//PJSIP_CRED_DATA_PLAIN_PASSWD; acc->cfg.cred_info[0].data = pj_str(SIP_PASSWD); acc->cfg.reg_timeout = PJSIP_REGC_EXPIRATION_NOT_SPECIFIED; Can anyone please help me, what is that I am missing. The user gets registered when I try with pjsua sample. But I need to use the pjlib rather than pjsua. Thanks and Regards, Ram ******************************************************************** UnitedPro Software Solutions Pvt Ltd |Off: 42187875 / 76 | www.unitedprotech.com ******************************************************************** The contents of this email and any attachments are confidential. They are intended for the named recipient(s) only. If you have received this email in error please notify the system manager or the sender immediately and do not disclose the contents to anyone or make copies. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20110818/20a648dc/attachment.html>