<p>&gt;&gt; see distribution field</p>

<p>&gt;&gt; see patch cable</p>

<p>RJ stands for "Registered Jack", i.e. standardized connector, whereby the designation is often used in practice without correct reference to standardization according to USOC (Universal Service Ordering Code). The standard RJ10 connector has four contacts and is often used for the handset cord that connects the handset to the telephone housing. </p>

<p>RJ stands for "Registered Jack", i.e. standardized connector, whereby the designation is often used in practice without correct reference to the standardization according to USOC (Universal Service Ordering Code). The standard RJ11 connector has six contacts, of which the two outer contacts are usually not used. It is often used for the telephone cord, i.e. for the connection line with which a telephone or fax machine is connected to the socket. In practice, connection cables with RJ11 plugs are often plugged into RJ45 sockets. The RJ45 socket has eight poles and therefore it often happens that the outer edges of the RJ11 plug, which protrude over the lower contacts of the plug, damage the outer contacts of the RJ45 socket. RJ45 sockets from Telegärtner are therefore equipped with integrated overbend protection, which ensures that the RJ45 contacts are not damaged even in the event of mismating with RJ11 plugs. </p>

<p>RJ stands for "Registered Jack", i.e. standardized connector, whereby the designation is often used in practice without correct reference to standardization according to USOC (Universal Service Ordering Code). The RJ12 connector is mainly used for value-added services such as ISDN. </p> <p><img src="/default-wAssets/img/glossar/kupfertechnik/RJ12.jpg" alt="RJ12" /><br /></p>

<p>RJ stands for "Registered Jack", i.e. standardized connector, whereby the designation is often used in practice without correct reference to standardization according to USOC (Universal Service Ordering Code). The RJ45 connector is standardized in the IEC 60603-7 series of standards as follows <br />IEC 60603-7 Basic standard with mechanical dimensions,<br />Unshielded<br />IEC 60603-7-1 Basic standard with mechanical dimensions,<br />Shielded<br />IEC 60603-7-2 Connectors up to 100 MHz / Cat. 5,<br />unshielded<br />IEC 60603-7-3 Connectors up to 100 MHz / Cat. 5,<br />shielded<br />IEC 60603-7-4 Connectors up to 250 MHz / Cat. 6,<br />unshielded<br />IEC 60603-7-41 Connectors up to 500 MHz / Cat. 6A,<br />unshielded<br />IEC 60603-7-5 Connectors up to 250 MHz / Cat. 6A,<br />shielded<br />IEC 60603-7-51 Connectors up to 500 MHz / Cat. 6A,<br />shielded<br />IEC 60603-7-81 Connectors up to 2000 MHz / Cat. 8.1,<br />shielded<br />IEC 60603-7-7: Connectors up to 600 MHz / Cat. 7,<br />shielded<br />(this standard describes the GG45 connector, where<br />only the socket is backwards compatible with the RJ45-<br />plug; the GG45 plug is NOT compatible with<br />RJ45 sockets)<br />IEC 60603-7-71 connector up to 1000 MHz / Cat. 7A,<br />shielded<br />(this standard describes the GG45 connector,<br />see IEC 60603-7-7 )<br />IEC 60603-7-82 Connectors up to 2000 MHz/Cat. 8.2,<br />shielded.<br />(this standard describes the GG45 connector,<br />see IEC 60603-7-7)<br />The contacts of the sockets have color codes to make it easier to connect the wires: T568A and T568B. The A variant was originally developed for the military, but is now also used for civilian applications. However, the color assignment<br />according to T568B is used much more frequently. EN 50173 does not specify a color assignment.</p> <p><img src="/default-wAssets/img/glossar/kupfertechnik/RJ12_2.jpg" alt="RJ45" /></p> <p><br />In practice, connection cables with RJ11 or RJ12 plugs (e.g. from telephones or fax machines) are often plugged into RJ45 sockets. The RJ45 socket has eight poles, the RJ11 or RJ12 plug has six poles, and it is therefore often the case that the outer edges of the RJ11 or RJ12 plug, which protrude over the lower contacts of the plug, damage the outer contacts of the RJ45 socket. RJ45 jacks from Telegärtner are therefore equipped with integrated overbend protection, which ensures that the RJ45 contacts are not damaged even if they are mismated with RJ11 or RJ12 plugs.<br /></p>

<p>Engl. delay; unit ns/km. The time a signal needs to cover a certain distance on a cable. </p>

<p>Engl. delay skew; unit ns. The time offset with which the signals on different wire pairs of a cable arrive at the receiver. </p>