t3000_write
t3000_write(FD, num, strlen(num));
t3000_write(FD, "\r", 1);
t3000_write(FD, "\r", 1); /* send anything to abort the call */
t3000_write(FD, "\rAT Z\r", 6); /* reset modem */
t3000_write(FD, "+++", 3);
t3000_write(FD, "\rAT Z\r", 6);
static void t3000_write(int, char *, int);
t3000_write(FD, "AT E0\r", 6); /* turn off echoing */
t3000_write(FD, "AT E0 H0 Q0 X4 V1\r", 18);
t3000_write(FD, "AT D", 4);