connection speed

   The speed of a data communications circuit. Some circuits are symmetrical and can maintain the same speed in both directions; others are asymmetrical and use a faster speed in one direction, usually the down stream side.TableC.1 compares the connection speeds available for several technologies.
   connectivity
   TABLE C.1 CONNECTION SPEEDS
   Technology   Speed   Distance Limitation
   Conventional modem   56Kbps downstream, up to 33.6Kbps upstream   None
   ISDN   Up to 128Kbps symmetric                             18,000 ft
   Cable modem   Up to 30Mbps downstream, to 10Mbps upstream   30 mi
   ADSL   1.5 to 8Mbps downstream, to 1.544Mbps upstream      18,000 ft
   SDSL   1.544 to 2.048Mbps symmetric                        10,000 ft
   HDSL   1.544 to 2.048Mbps symmetric (over 3 phone lines)   15,000 ft
   VDSL   13 to 52Mbps downstream, 1.5 to 2.3Mbps upstream    4,500 ft

Dictionary of networking . 2014.

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