NTT believes that the total number of regular telephone circuit
subscribers will likely continue decreasing for the time being.
To understand how the 202 transmits its data, we should understand the frequency response of a basic telephone circuit
. The 202 modem will modulate the binary ones and zeros as two tones within the allowable spectrum of the voice line.
The advantage of managing a component network composed of modems, telephone circuits
, direct digital circuits (DDS) and terminals is that systems and test equipment are available for the management and testing of this type of network.
There is in my mind little doubt that basic or essential telecommunications will rely on the "plain old telephone" and sound broadcasting, the telephone circuit
and its associated facilities meeting the demand for various kinds of two-way communications and information transfer.
The sixth pin on the H-350 is often called Pin K Pin F is "hot" and gives the H-350 full-duplex operation over telephone circuits
Traditional data network security technologies do not interface with telephone circuits
, and cannot monitor traditional phone network traffic.
, for one, are very vulnerable to single point of failure outages on the south coast," said Parker, a former professor of communication at Stanford University and founder of a Silicon Valley company known then as Equatorial Communications.
A spokesperson for the council said the new system has enabled it to replace separate voice and data networks in the business centre and link it to the main office without the need for any additional investment in new telephone circuits
The speed of such modems is limited by the capacity of telephone circuits
that are designed to carry voices, not digital data.
Remote Data Terminals (RDT): A Terminal in a data-processing system from which data can be sent to or received from a central computer over telephone circuits
, but which exerts no direct operating control over the central computer.
NTT East and West are expected to use other carriers' telephone circuits
for inter-prefecture communications and allow them to set inter-prefecture and Internet access charges so that the two will not violate the NTT Law.
Under that agreement, TELMEX said it would furnish competing carriers with private lines and telephone circuits
to provide service between the US and Mexico.