End distributors
A final distributor (abbreviation EVz ) is a component of the " line technology " of the German telephone network . It is intended to terminate the telephone cable ( usually underground ) routed into the house or to the outside wall ("local connection cable "). From there the terminal lines lead to the terminal device connection sockets ( TAE ); usually with an installation cable to the " 1st TAE ".
Usage
Terminal blocks are often used as APL .
Versions or types
Another letter appended to the designation EVz specifies the older EVz types more precisely according to their possible use:
- EVzi ("i" for interior construction), suitable for dry interior areas
- EVza ("a" for exterior construction), suitable for damp rooms and outdoors
This additional information can no longer be found with newer EVz, as they are basically suitable for outside and inside. It is now common practice to mount it inside a building, preferably in the house connection room . The EVz is only attached outside if no suitable interior space is available (e.g. in buildings with no basement).
Many different types of EVz have been used over the years. Due to the longevity of the cable infrastructure, EVz of all types can still be found.
Type overview
The number indicates the two-digit year (19xx) the introduction or construction of the respective EVz type at the Deutsche Reichs- , Bundespost or Deutsche Telekom :
| Type | Number of pairs |
Contact technology | comment | |
|---|---|---|---|---|
| Connection cable | Installation page | |||
| EVza 25 | 5 or 10 | Solder lug | Screw terminal | made of cast iron |
| EVzi | 5 or 10 | Solder lug | Screw terminal | Predecessor of the EVzi 57 a |
| EVzi 57 a | 5 or 10 | Solder lug | Screw terminal | |
| EVza 59 | 10 | Solder lug | Screw terminal | |
| EVza 64 a | 10 | Solder lug | Screw terminal | |
| EVza 72 | 10 | Screw terminal | Screw terminal | |
| EVz 78 | 10 | Screw terminal | Screw terminal | |
| EVz 80 | 6th | Screw terminal | Screw terminal | |
| EVz 83 | 2 | LSA | LSA | |
| EVz 84 | 6th | LSA | LSA | |
| EVz 85 | 10 | LSA | LSA | |
| EVz 88 | Max. 30th | LSA | LSA | |
| EVz 98 | 10 (2 to 200) | LSA | LSA | also with screw terminals |
- Given the usual number of pairs that can be placed in EVz. Some newer EVz types are also available with a different number of pairs of wires.
- LSA means connection technology without soldering, screwing and stripping , see also insulation displacement connector
EVzi 57 a for 5 pairs
EVzi 57 a for 5 pairs, cover removed
EVza 59: closed on the left, hood removed on the right
EVz 80: closed on the left, cover removed on the right
EVz 84: for 6 DA, LSA + technology
EVz 88: for up to 30 DA, LSA + technology (two LSA strips installed)
EVz 98
EVza 25
The EVza 25 was intended for cable termination outdoors or in damp rooms. It was produced in two sizes, for five and for ten twin wires. Its housing is made of cast iron . The EVza 25 is divided into two rooms, the cable termination room and the switch room. The cable termination area is closed on the rear side of the EVz by a cover with a rubber seal and the control room on the front side by a curved cover with a rubber seal. The control room cover is attached to the housing with a hinge. The wires of the connection cable are placed on solder hooks in the cable termination area; the wires of the installation cables clamped under brass screws in the control room. EVza 25 is rarely found in use.
EVza 59
Because of the time-consuming maintenance of the EVza 25 (rust removal and painting), the EVza 59 was developed as a successor in 1959 . It consists of polyester resin and, like the EVza 25, is divided into a cable termination area and a control room. The cable termination area is closed with a cover with a rubber seal, the switch room does not have its own cover. The wires of the connection cable are placed on solder hooks in the cable termination area; the wires of the installation cables are connected in the control room under screw terminals. A protective hood that is put on from above without an additional seal serves as weather protection. It is fastened to the wall with a separate console on which the end distributor is placed. Despite their age, EVza 59 are still often found in old buildings in the old federal states.
literature
- Handheld dictionary of electrical telecommunications ; 2nd Edition; 1. Volume A-F; Pp. 362-364
