| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To shorten processing time to be required for restoring carrier disconnection in PPP communication. <P>SOLUTION: A communication modem (modem apparatus) 11 has a functional unit for maintaining a CD (carrier detection) signal at an ON state without turning off the CD signal when carrier disconnection is generated before receiving a flag synchronizing bit again after receiving a character other than the flag synchronizing bit in a telegram of PPP communication, and for transmitting a resend request frame to an opposite station through a public line 12. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
