AUX - Dial up

[Tan Choh Koon]

Hi,   I had connected the US Robotic Sportster modem to the 1720 Aux port, but router cannot detect the modem. I had used correct cable as what manual shown. What I am not aware off ?       line con 0  transport input none line aux 0  autobaud  modem InOut  modem autoconfigure discovery  stopbits 1  flowcontrol hardware line vty 0 4   Debug confmodem : 0:03:59: TTY5: detection speed (115200) response ------ 00:04:05: TTY5: detection speed (57600) response ------ 00:04:10: TTY5: detection speed (38400) response ------ 00:04:15: TTY5: detection speed (19200) response ------ 00:04:21: TTY5: detection speed (9600) response ------ 00:04:26: TTY5: detection speed (2400) response ------ 00:04:32: TTY5: detection speed (1200) response ------ 00:04:37: TTY5: detection speed (300) response ------ 00:04:37: TTY5: No modem found