hello, i'm trying change registration interval..i found these options in pjsua_acc_config : pjsua_acc_config::reg_timeout Optional interval for registration, in seconds. If the value is zero, default interval will be used (PJSUA_REG_INTERVAL, 300 seconds). pjsua_acc_config::reg_retry_interval Specify interval of auto registration retry upon registration failure (including caused by transport problem), in second. Set to 0 to disable auto re-registration. Default: PJSUA_REG_RETRY_INTERVAL when i set reg_timeout to 20 seconds application still show 60 seconds: /pjsua-arm-unknown-linux-gnu --id sip:pc2 at 192.168.10.123 --registrar sip:192.168.10.123 --realm asterisk --username pc2 --password heslo --local- port=5066 --app-log-level 6 --play-file=cd8.wav --no-vad --ec-tail=0 --reg- timeout=20 from log: pjsua_acc.c sip:pc2 at 192.168.10.123: registration success, status=200 (OK), will re-register in 60 seconds Exists some minimum timeout for registration interval? I tried to find it in pjsip library but without success. Can me somebody give hint where i can find minimum interval? Second option work perfect. when i set it to 10 second...every 10 second when client is disconnected it try reconect to server. thanks