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The device in order to connect the terminal unit to the digital circuit. In order to use the ISDN circuit, DSU being necessary, being maximum, it can connect up to equipment such as 8 telephones and terminal adapter. It operates by the electric power which is sent via the telephone line from NTT. In the past only the rental from NTT was permitted, but because the purchase by the user is rescinded, recently those which build in DSU to the terminal adapter become main current, as independent equipment have become unable to use.
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D-Sub <D-Subminiature>
Reading: D sub
Field:
Personal computer > I/O > D-Sub
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| One of the connector form which is used in telecommunications. there is a type of 9 pins, 15 pins, 25 pins and 50 pins etc depending upon the number of pins. From the fact that shape of section has been similar to D of alphabet this way it is said that it reached the point where it is called. The connector where the pin has been attached the connector where the hole where the male and the pin are inserted has lined up is called the female. It is used as the connector of the serial port and the parallel port and the display port. |
DSVD
Reading: D s buoy D
Full spelling: Digital Simultaneous Voice and Data
Field:
Communication service > public network > telephone line/modem > DSVD |
Technology in order to do audio telephone call and data communication simultaneously with 1 these telephone lines. It is standardized by the advice, V.70 of the International Telecommunication Union When conversation is begun by the telephone which in DSVD correspondence modem is connected to modem during data communication, lowering the speed of data communication automatically, digitalizing sound, sending and receiving it does. Because the semiconductor for speech compression is necessary, price of correspondence modem is higher than ASVD of analog system.
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DTCP
Reading: The D tea sea tweet
Full spelling: Digital Transmission Content Protection
Field:
Security > right protection > DTCP |
Technical standard in order to transmit the contents which are protected IEEE 1394 and the like at the time of communicating between the equipment which was used, copyright protective technology by.
The DTCP corresponding equipment DTLA which does license management has kept the certificate which the corporation issues, when the equipment is connected, using this, it does certification mutually. When it judges that sending and receiving of the contents is possible, you exchange the cipher key, encode the contents and sending and receiving do.
It tried to be able to utilize DTCP with communication with IP network, is developed, is used in connection and the like of the AV equipment which utilizes inside LAN home. |
DTCP-IP
Reading: The D tea sea tweet the eye tweet
Full spelling: Digital Transmission Content Protection over Internet Protocol
Field:
Security > right protection > DTCP-IP |
Technical standard in order to transmit the contents which are protected inside IP network inside LAN and the like home, copyright protective technology by mainly. DTCP which is the copyright protective technology which is mounted in the communication standard of IEEE 1394 and the like it is something which is applied to IP network.
DTCP-IP, encoding the contents, by the fact that it transmits on IP network, prevents the illegitimate copy of the contents by the wiretap of the packet. In addition the contents from inside LAN home to network outside Internet and the like protect the copyright of the contents by the fact that the fact that it flows out is prevented.
Presently, copyright protective technology of the digital data as, SONY OpenMG and Windows Media of the Microsoft corporation there are DRM and the like many ones, but these are something which each company developed individually, there is no compatibility between each technology. Because of this, copyright transferring to the digital audio equipment where another enterprise inside LAN inside home developed the music file which is protected, for example due to the DRM technology of a certain enterprise, it cannot do to play back.
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