Hi to all, In my "fs_cli" I am getting bellow message very frequently. Can you any one help me where is the error? 2011-08-02 17:11:33.028452 [INFO] ftmod_sangoma_isdn_stack_rcv.c:995 sng_isdn->s1: Invalid Q.921/Q.931 frame - ignoring len:1 2011-08-02 17:11:33.048455 [INFO] ftmod_sangoma_isdn_stack_rcv.c:995 sng_isdn->s1: Invalid Q.921/Q.931 frame - ignoring len:1 2011-08-02 17:11:33.048455 [INFO] ftmod_sangoma_isdn_stack_rcv.c:995 sng_isdn->s1: Invalid Q.921/Q.931 frame - ignoring len:1 2011-08-02 17:11:33.068455 [INFO] ftmod_sangoma_isdn_stack_rcv.c:995 sng_isdn->s1: Invalid Q.921/Q.931 frame - ignoring len:1 2011-08-02 17:11:33.068455 [INFO] ftmod_sangoma_isdn_stack_rcv.c:995 sng_isdn->s1: Invalid Q.921/Q.931 frame - ignoring len:1 2011-08-02 17:11:33.068455 [INFO] ftmod_sangoma_isdn_stack_rcv.c:995 sng_isdn->s1: Invalid Q.921/Q.931 frame - ignoring len:1 -- Regards Venkatesan OV.