Toshiba Tecra M9 PTM91C-TG109C Users Manual Canada; English - Page 186

AT Commands E0 Disables echo to the computer. E1 Enables echo to the computer (default). Result Codes: OK n=0,1 ERROR Otherwise Hn Hook control This command instructs the modem to go on-hook to disconnect a call, or off-hook to make the phone line busy. H0 Modem goes on-hook (default). H1 Modem goes off-hook. Result Codes: OK n=0,1 ERROR Otherwise In Request ID information This command displays product information about the modem. I0 Returns modem identity string and driver version number. I3 Same as I0. I9 Returns region ID in English. Result Codes: OK n=0,3,9 ERROR Otherwise Ln Monitor speaker volume This command sets speaker volume to low, medium, or high. L0 Low volume. L1 Low volume. (Same as L0) L2 Medium volume (default). L3 High volume. Result Codes: OK n=0,1,2,3 ERROR Otherwise Mn Monitor speaker mode This command turns the speaker on or off. M0 The speaker is off. M1 The speaker is on until the modem detects the carrier signal (default). M2 The speaker is always on when modem is off-hook. M3 Speaker is on until the carrier is detected, except when dialing. User's Manual C-3