DBH 2101 (replaces DF 220)
This telephone, which has a black Bakelite cover, is equipped with a dial and a keypad with two buttons - a red one for connecting wire L1 and one white for wire L2. It is equipped with two AC ringers, one mounted in a wall the bracket, the other inside the device. The line L1 connects to the public network and the line L2, which can be used as a request line, attached to the local exchange. The device is connected to one or other management by the corresponding button is suppressed. Calls on one line cannot be is listened to on the other. If during ongoing call over the line L1 some information needs to be obtained from an extension, the white button is pressed.

The device is then connected to line L2. The Red the button stays in the depressed position and wire L1 is held.

When the call over line L2 has ended, press again the red button, which has an additional bottom position; here in- through, the white button is released and the device is switched across from wire L2 to wire L1.

The device can be mounted using a DYY 1012 shelf on wall.

Parts:
Microphone RLF 1001 made of black Bakelite with microphone capsule RLA 1001, 200ohms, and string TRS 1302, 1250 mm.
Dial.
Transformer REK 10 104.
Line cord TRS 1601, 1250mm.
Ringer of 1000ohms, for line L2, consisting of: mechanism KLA 1004.
Bell gong with low tone 138543/1.
Bell gong with high tone 138543/3.
Wall bracket made of black lacquered sheet metal with capacitor RKA 7010, 1 //F, (two) and bell of 1000 ohm, for wire L1, consisting of:
mechanism KLA 1064, bell gong with low tone 138 543/1 and bell gong with high tone 138543/3.

Dimensions:
Height 139mm, width 233mm, depth 178mm.

Weight 3.5 kg.

DBH 2301
This is a table telephone with request wiring for the manual CB system.  This device is similar to the automatic device DBH 2101 but lacks a dial. The device is intended to be used in reversed, as both lines are connected to Manual CB telephone exchanges.

Taken from the L. M. Ericsson Catalogue No. 610 (1939) - Swedish Translation

Circuit Diagram - 226694.

Last revised: April 04, 2024