Hi, I made the changes suggested in http://www.pjsip.org/trac/wiki/FAQ#pjsua-lib-perf. I'm using the following parameters: for the conference bridge: Conference bridge slots: 10 Sample rate: 8000 Hz Channels: 1 samples per frame: (20*Sample rate)/1000 Bits per sample: 16 Bridge Option: PJMEDIA_CONF_NO_DEVICE | PJMEDIA_CONF_USE_LINEAR for the application: pjsua_config::max_calls = 500 my config_site.h has the options inside config_site_sample.h under PJ_CONFIG_MAXIMUM_SPEED #define I made a application that receives calls and plays a wav file. With a few calls it goes ok. If I try to put a lot of calls I get some problems. After I get 373 calls the application quits and the function pjmedia_master_port_create returns the code 120012. If I print it with pj_strerror() it says: "Cannot allocate memoryAborted". All help is very welcome, Thiago Abra sua conta no Yahoo! Mail, o ?nico sem limite de espa?o para armazenamento! http://br.mail.yahoo.com/