|
|
Joined: Jun 2007
Posts: 60
Member
|
Member
Joined: Jun 2007
Posts: 60 |
There was a Western Electric 400E line card. An article entitled"Advances in the 1A2 Key Telephone System", in the October 1970 Bell Laboratories Record, has a photo of the Western Electric 400D and the Western Electric 400E side by side.They had reduced the number of components from 41 to 17. This was done by replacing the transistors and all the components on the small secondary circuit board with an integrated circuit chip. It must not have worked out because in the early 70's the BSP for the 400 series noted the 400E Manufacture Discontinued.
|
|
|
Visit Atcom to get started with your new business VoIP phone system ASAP
Turn up is quick, painless, and can often be done same day.
Let us show you how to do VoIP right, resulting in crystal clear call quality and easy-to-use features that make everyone happy!
Proudly serving Canada from coast to coast.
|
|
Forums84
Topics94,299
Posts638,877
Members49,770
|
Most Online5,661 May 23rd, 2018
|
|
1 members (Professor Shadow),
119
guests, and
315
robots. |
Key:
Admin,
Global Mod,
Mod
|
|
|
|
|