sunkara wrote: use this function " t_write_unix("/tmp/sems_sock " the t_write_reg is not there in OpenSER, in global configuration ... describer openser_sock in the sems.conf ... mention the openser_sock i hope this help u I use unix function and change openser.cfg and edit sems.conf openser-1.2.1 sems-0.10.0-rc2 This is my openser.cfg debug=3 # debug level (cmd line: -dddddddddd) fork=yes log_stderror=no # (cmd line: -E) children=4 port=5060 unix_sock="/tmp/openser_sock" mpath="/usr/local/lib/openser/modules/" loadmodule "mysql.so" loadmodule "sl.so" loadmodule "tm.so" loadmodule "rr.so" loadmodule "maxfwd.so" loadmodule "usrloc.so" loadmodule "registrar.so" loadmodule "textops.so" loadmodule "mi_fifo.so" loadmodule "avpops.so" loadmodule "exec.so" modparam("mi_fifo", "fifo_name", "/tmp/openser_fifo") modparam("usrloc", "db_mode", 0) modparam("tm", "fr_inv_timer", 15000) modparam("tm", "pass_provisional_replies", 1) modparam("rr", "enable_full_lr", 1) modparam("avpops", "avp_url", "mysql://ser:heslo@localhost/ser") modparam("avpops", "avp_table", "subscriber") #modparam("avpops", "uuid_cloumn", "id") #modparam("avpops", "username_cloumn", "username") modparam("avpops", "db_scheme", "email_scheme:table=subscriber;value_col=email_address;value_type=string") modparam("tm", "tw_append", "voicemail_headers: UA=$hdr(User-Agent);P-Email-Address=$avp(s:email)") route{ if (!mf_process_maxfwd_header("10")) { sl_send_reply("483","Too Many Hops"); exit; }; if (msg:len >= 2048 ) { sl_send_reply("513", "Message too big"); exit; }; if (!method=="REGISTER") record_route(); if (loose_route()) { # mark routing logic in request append_hf("P-hint: rr-enforced\r\n"); route(1); }; if (!uri==myself) { append_hf("P-hint: outbound\r\n"); route(1); }; if (uri==myself) { if (method=="REGISTER") { save("location"); exit; }; lookup("aliases"); if (!uri==myself) { append_hf("P-hint: outbound alias\r\n"); route(1); }; if (!lookup("location")) { if (!t_newtran()){ sl_send_reply("500", "could not create new transaction"); exit; }; avp_db_load("$ru/username", "$avp(s:email)/$email_scheme"); if (!t_write_unix("/tmp/sems_sock", "voicemail/voicemail_headers")){ t_reply("500", "aaaaa"); exit; }; }; append_hf("P-hint: usrloc applied\r\n"); }; route(1); } route[1] { if (!t_relay()) { sl_reply_error(); }; exit; } This is my sems.conf plugin_config_path=/usr/local/etc/sems/etc/ fork=yes stderr=no loglevel=2 socket_name=/tmp/sems_sock reply_socket_name=/tmp/sems_reply_sock ser_socket_name=/tmp/openser_sock send_method=socket plugin_path=/usr/local/lib/sems/plug-in smtp_server=localhost smtp_port=25 rtp_low_port=10000 rtp_high_port=60000 media_processor_threads=1 But error msssgae is server error occurred(1/SL) error log is Jun 8 15:58:10 host /usr/local/sbin/openser[1462]: ERROR:tm:t_forward_nonack: no branch for forwarding Jun 8 15:58:10 host /usr/local/sbin/openser[1462]: ERROR:tm:w_t_relay: t_forward_nonack faile I can not find problem What is error with my configuration? Thank you for your reply. Chungyu