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The famous Strowger electromechanical switches, first the 2000-type in the 1930s and the 4000-type in the 1960s, were the basis of telephone exchanges. However they were slow, working in real time with 0.1-second pulses from the subscriber's dial, and consumed a lot of power, plus they needed a lot of maintenance. One exchange I worked in had about 80,000 lines and used about 100 kW of power at 50 volts in the morning busy-hour. And all exchanges had to have a battery to keep them going for 24 hours in an emergency.
A 10,000-line exchange can't be explained in ten lines with such a wide variation in readers' prior knowledge.
What else can I help you with?
When was Design Exchange created?
Design Exchange was created in 1994.
Who design the the telephone?
Henry Dreyfuss
What is the telephone number of the art institute of Virginia beach?
The telephone number of Virginia Beach Culinary Arts and Design School is (757)- 493- 6700. This would be the telephone number of Virginia Beach Culinary Arts and Design School.
Where can I go to exchange the wood?
To change the wood in your design you can go to the store where you got the design. Or you can get a new design entirely that will complement the new wood better.
Who drafted the original design for alexander graham bells telephone?
Lewis Latimer
What is the telephone contact number for the pension company IPSD?
The telephone contact number for the pension compny IPSD, which means Innovative Pension Study & Design, whose telephone contact number is 1-800-98PENSION.
What is a central battery?
A central battery system is a setup where all the emergency lights in a building are powered from a central source, usually a bank of batteries. This design allows for easier maintenance and testing of emergency lighting systems.
Why does London have red telephone boxes?
It doesn't any more. They were all replaced by glass telephone boxes about 20 years ago. Most telephone boxes - of any design - are now redundant because of the widespread use of mobile (cell) phones.
What has the author Jimmie Cortez Tyner written?
Jimmie Cortez Tyner has written: 'Design of a carrier-telephone translator'
Where is Somerset Website Design Company located?
The Somerset Website Design Company is located; Minehead, 1 The Parks, Minehead, Somerset, TA24 5NF. The business telephone number is 01643709211.
Why are telephone cords coiled?
Telephone cords are coiled to prevent tangling and to make them easier to store and handle. The coiled design allows the cord to stretch out when needed and then retract back into a compact form when not in use.
What year Nikola Tesla invents the telephone?
When the new telephone exchange was finally started in Budapest in 1881, he was placed in charge of it. Here he made his first invention, then called a telephone repeater, or amplifier, but which today would be more descriptively called a loud speaker--an ancestor of the sound producer now so common in the home radio set. This invention was never patented and was never publicly described, but, Tesla later declared, in its originality, design, performance and ingenuity it would make a creditable showing alongside his better-known creations that followed.
