In a modem apparatus including a modem circuit, opera tively connected to a computer and
a communication line, a ringing signal detector detects a ringing signal received through the …

57 ABSTRACT A modem which connects to a data terminal is connected to a telephone line
capable of Supporting multiple directory numbers with each number having a distinctive ring …

57 ABSTRACT A modem which connects to a data terminal is con nected to a telephone line
capable of supporting multi ple directory numbers with each number having a dis tinctive …

In modem apparatus having receiver circuitry which demodulates a received carrier into a
sequence of received signals and decodes each signal into a signal point drawn from a …

A device for identifying a determined repetitive Sequence of predetermined Signals arriving
on a modem. The device includes a delay circuit So that all the words of a Sequence are …

James H. Morris 57 ABSTRACT The invention relates to a device for identifying a predeter
mined sequence of signals arriving on a modem, the sequence having a frequency …

57 ABSTRACT A method and apparatus for detecting an escape sequence to cause a
modem to switch from a data transmission mode to a command mode. The escape …

57 ABSTRACT A modem LSI includes a combination of a first frequency divider, a first PLL
circuit composed of a phase comparator. an LPF and a VCO, and a first select switch for …

A modem connected to a telephone line and capable of preventing noise from being
generating upon the modem being powered-on or reset includes a ring detector for …

The present invention relates to method and apparatus for judging a timing phase of a
modem which is used in data communication for judging a timing phase from a reception …