G.703
Sign in to saveG.703 is a ITU-T standard originally written in 1972 but subsequently revised a number of times since. It defines a physical and electrical interface used for encoding voice or data over 75 ohm co-axial cable terminated in BNC or Type 43 connectors or 120 ohm twisted pair cables terminated in RJ48C jacks. The choice is carrier- and region-dependent.
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G.703 is a ITU-T standard originally written in 1972 but subsequently revised a number of times since. It defines a physical and electrical interface used for encoding voice or data over 75 ohm co-axial cable terminated in BNC or Type 43 connectors or 120 ohm twisted pair cables terminated in RJ48C jacks. The choice is carrier- and region-dependent.
G.703 defines digital carriers of various speeds such as T1 and E1. These are organised as part of a hierarchy of carriers defined in G.702.
Excerpted from Wikipedia’s “G.703” article, available under the CC BY-SA 4.0 licence.