line balancer
Inventory NumberRS0154
ClassificationTelephone Equipment
Subject
Maker
Western Electric Company
1869 - 1995
Cultural Region
Dimensions18 x 22 x 38 cm (7 1/16 x 8 11/16 x 14 15/16 in.)
Material
DescriptionA Western Electric-Cruft line balancer mounted in a walnut box with metal operating fixtures and bakelite knobs.
Signedetched on top panel: THOMPSON LEVERING CO. / PHILA. PA
FunctionPossible function: Line balance
For telephone local loops, crosstalk is related to how well balanced the circuit is. Loop current does not affect that balance, even if excessively high. If the balance is not good enough you can hear crosstalk from other telephone lines or from other noise sources. The balance of the telephone line is determined by the circuits connected to telephone line ends (typically line transformers) and the quality of the telephone cable (wet cable can cause noticeable balance problems if wires are in contact with the water).
http://www.epanorama.net/circuits/teleinterface.html
For telephone local loops, crosstalk is related to how well balanced the circuit is. Loop current does not affect that balance, even if excessively high. If the balance is not good enough you can hear crosstalk from other telephone lines or from other noise sources. The balance of the telephone line is determined by the circuits connected to telephone line ends (typically line transformers) and the quality of the telephone cable (wet cable can cause noticeable balance problems if wires are in contact with the water).
http://www.epanorama.net/circuits/teleinterface.html
Historical AttributesCruft
Western Electric Company
Object number: RS1384
Western Electric Company
Date: circa 1918
Object number: RS0207
Western Electric Company
Accessories: 2 small keys.
Object number: RS0127
Western Electric Company
Accessories: 2 small keys for the lock attached with wire loop.
Object number: RS0125