Großer Feldklappenschrank Modules

Discussions on the equipment used by the Axis forces, apart from the things covered in the other sections. Hosted by Juha Tompuri
Post Reply
User avatar
Rotwang M
Member
Posts: 63
Joined: 22 Jul 2021, 21:10
Location: USA

Großer Feldklappenschrank Modules

#1

Post by Rotwang M » 02 Apr 2022, 18:19

The Grosser Feldklappenschrank was assembled with specialized modules that were stacked on top of the Untersatz base units. This page will cover the most commonly used modules.

Image

The most commonly used module was the Connection Unit. Connection Units came in 10 and 50 line variations. Each Connection Unit had signal flaps and corresponding jack sockets so the operator could insert the red plug of the Untersatz to answer a call or insert the black plug to complete a call.

Image
10 Line Connection Unit – Front View

Field telephones were wired into the Connection Units via a 30-pin plug on the rear of the unit. 10 of the pins were not used. The remaining 20 pins carried the a and b phone wires.

Image
10 Line Connection Unit – Rear View

The Connection Unit drop flaps would drop to signal the operator of an incoming call. When the operator would insert the red plug into the corresponding jack socket to answer the call, the flap would automatically go up.

Image
Connection Unit Drop Flap Mechanism

Image
50 Line Connection Unit – Front View

It is interesting to note that the 50 Line Connection Unit was produced with an integral 10 Line Conference Call Unit at the top. All jack sockets of the Conference Call Unit were connected in parallel, so multiple callers could be plugged into one circuit. A separate 10 Line Conference Call Unit was also produced.

Image
10 Line Conference Call Unit

To provide access to outside lines of the automatic exchange network, 3 Line Rotary Dial Amtszusatz Units were provided. This provided direct dial access to the civilian telephone network.

Image
3 Line Rotary Dial Amtszusatz Unit – Front View

Image
3 Line Rotary Dial Amtszusatz Unit – Rear View

Image
3 Line Rotary Dial Amtszusatz Unit – Rear View

Image
3 Line Rotary Dial Amtszusatz Unit – Settings

Large exchanges required the use of 150 Line Parallel Connection Units. These units allowed an operator at one switchboard to connect calls with lines at a neighboring switchboard. The Parallel Connection Units were connected to 10 and 50 Line Connection Units and phone connection terminal strips via 30 conductor cables.

Image
150 Line Parallel Connection Unit – Front View

The rear of the 150 Line Parallel Connection Unit had two columns of 30-pin sockets, with 15 sockets in each column. Both columns were wired together, so the 30-pins of the socket in the first row of column 1 connected electrically to the 30-pins of the socket in the first row of column 2, and so forth.

Image
150 Line Parallel Connection Unit – Rear View

Image
Untersatz Power Cord, Terminal Strip, and 30-pin Connector

Image
Telephone Line Terminal Strips

Image
Unit Short Interconnection Cord and 30-pin Plugs

Image
Unit Long Interconnection Cord and 30-pin Plugs

Image
Interconnecting Cable Connections of a Large Switchboard Exchange Consisting of Untersatzen B and C.

The rear of Grosser Feldklappenschrank large exchanges contained a huge number of interconnecting cables, batteries, and polwechslers.

Image
Rear View of a Large Exchange Showing Interconnection Cords, Plugs, and Batteries

Check out my blog about WW2 German field telephone equipment… https://rotwangm.wordpress.com/groser-f ... k-modules/

Sturm78
Member
Posts: 17927
Joined: 02 Oct 2008, 18:18
Location: Spain

Re: Großer Feldklappenschrank Modules

#2

Post by Sturm78 » 06 Dec 2022, 13:00

Hi all,

An image form Ebay:

Sturm78
Attachments
German telephone switchboards Grosse Feldklappenschrank R1---.jpg


Sturm78
Member
Posts: 17927
Joined: 02 Oct 2008, 18:18
Location: Spain

Re: Großer Feldklappenschrank Modules

#3

Post by Sturm78 » 14 Feb 2023, 16:13

Hi all,

An image from Ebay

Sturm78
Attachments
German telephone switchboard Großer Feldklappenschrank and soldier in Italy, 1943.jpg

Sturm78
Member
Posts: 17927
Joined: 02 Oct 2008, 18:18
Location: Spain

Re: Großer Feldklappenschrank Modules

#4

Post by Sturm78 » 15 May 2023, 15:09

Hi all,

Another image from Ebay

Sturm78
Attachments
German telephone switchboard Grosse Feldklappenschrank.jpg

Sturm78
Member
Posts: 17927
Joined: 02 Oct 2008, 18:18
Location: Spain

Re: Großer Feldklappenschrank Modules

#5

Post by Sturm78 » 02 Aug 2023, 18:11

Hi all,

Can somebody identify the equipment in the red circle ?
It seems to be connected to a Großer Feldklappenschrank telephone switchboard...

Image from Ebay
Sturm78
Attachments
German telephone switchboard Großer Feldklappenschrank and2.jpg

Sturm78
Member
Posts: 17927
Joined: 02 Oct 2008, 18:18
Location: Spain

Re: Großer Feldklappenschrank Modules

#6

Post by Sturm78 » 23 Oct 2023, 22:33

Nobody for my last question ??

Well, here antoher image from Ebay:

Sturm78
Attachments
s-l1600 (32).jpg

Sturm78
Member
Posts: 17927
Joined: 02 Oct 2008, 18:18
Location: Spain

Re: Großer Feldklappenschrank Modules

#7

Post by Sturm78 » 29 Oct 2023, 22:28

Hi all,

Two images from Ebay

Sturm78
Attachments
German telephone switchboard Großer Feldklappenschrank and soldiers ,.jpg
German telephone switchboard Großer Feldklappenschrank and soldier - ,-.jpg

Post Reply

Return to “Other Equipment”