In The Name Of God The compassionate merciful Good day everyone ; How to disable modem speaker sound ? (modems speaker). There is AT command for turning of modem sound (M0) but should it be saved to take effect ? and How to enable microphone while talking with ATDT ?pc speaker broadcasts friend voice but how to talk with him ? and driver is installed ,it is used as dial up internet ,fax . This modem .http://en.thinkwiki.org/wiki/ThinkPad_56K_Modem_(MDC-1.5) driver in ubuntu :hsfmodem full Regards dehqan