Hi, When I start asterisk with asterisk -vvvvc it works preaty well, but I get the following warnings: Warning, flexibel rate not heavily tested! WARNING[1074494176]: File res_musiconhold.c, Line 462 (moh_register ): Unable to open pseudo channel for timing... Sound may be choppy. WARNING[1074494176]: File res_musiconhold.c, Line 462 (moh_register ): Unable to open pseudo channel for timing... Sound may be choppy. WARNING[1074494176]: File res_musiconhold.c, Line 462 (moh_register ): Unable to open pseudo channel for timing... Sound may be choppy. WARNING[1074494176]: File chan_oss.c, Line 346 (setformat): Requested 8000 Hz, got 7954 Hz -- sound may be choppy WARNING[1074494176]: File chan_oss.c, Line 974 (load_module) : XXX I don't work right with non-full duplex sound cards XXX WARNING[1158883520]: File chan_oss.c, Line 232 (sound_thread ): Read error on sound device: Resource temporarily unavailable WARNING[1074494176]: File chan_iax2.c, Line 5482 (load_module ): Unable to open IAX timing interface: No such device WARNING[1074494176]: File chan_iax2.c, Line 4966 (set_config ): Ignoring port for now NOTICE[1150495040]: File chan_sip.c, Line 4686 (sip_poke_noanswer WARNING[1074494176]: File chan_zap.c, Line 6590 (load_module ): Ignoring rxwink They are some sound problems when playing music on hold (a little bit choppy) or when codec conversion is made (for example G.711 to GSM). I cannot use a SIP phone with GSM (X-Lite) and another one with G.711 (for example Cisco 7960) to talk each other. Both of them can well access the mailbox or other services, but when I try to talk between them the sond is unacceptable. I must select G.711 on X-Lite too in order to be able to use them. Thanks, Dan