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Author Topic: NE-208A KEY TELEPHONE UNIT and 2564  (Read 3019 times)

Offline poplar1

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Re: NE-208A KEY TELEPHONE UNIT and 2564
« Reply #15 on: July 04, 2014, 04:03:29 PM »
One 207=9 stations 2 through 0 (0 is 10 pulses on a rotary dial)

Add one 216=9 additional stations; you lose one of the 207 codes which becomes the transfer digit. If you pick 2 as the transfer digit, then you would have codes 3-0 (9 codes) + 21-20 (9 codes)

Add another 216=9 additional codes=27
4, 5, 6, 7, 8, 9, 0=7
21, 22, 23, 24, 25, 26, 27, 28, 29, 20=10
31, 32, 33, 34, 35, 36, 37, 38, 39, 30=10

So for 19 codes you would need one 207 + two 216s

It may be possible to mix flashing and non-flashing intercom lamps, so that if you have only one 208, you would have 3 stations with flashing lamps and the rest not flashing. I don't know because I haven't tried it or seen any documentation stating that.
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Offline Babybearjs

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Re: NE-208A KEY TELEPHONE UNIT and 2564
« Reply #16 on: July 04, 2014, 08:46:47 PM »
does anyone know where I can find the schematic info for the 216?? I have one of them, how would I daiseychain 2 of them....
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John

Offline Dave F

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Re: NE-208A KEY TELEPHONE UNIT and 2564
« Reply #17 on: July 04, 2014, 10:59:11 PM »
Quote from: Babybearjs on July 04, 2014, 08:46:47 PM
does anyone know where I can find the schematic info for the 216?? I have one of them, how would I daiseychain 2 of them....
The schematic for the 216A (and it's associated 207C) can be found in BSP 518-240-401 i2 (Feb 1963), page 17.

DF
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Offline Babybearjs

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Re: NE-208A KEY TELEPHONE UNIT and 2564
« Reply #18 on: August 12, 2014, 06:37:33 PM »
I went into Phoneco's site and found they had updated their key Equipment for sale..... almost nothing left.... and all the 208's seem to be gone... they had about 40 of them, but given that a system needs about 4 of these units for 9 stations.... then I guess they went pretty fast.... good thing I got what I needed.... the spares are in my shed....
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John

Offline Babybearjs

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Re: NE-208A KEY TELEPHONE UNIT and 2564
« Reply #19 on: September 28, 2017, 12:00:48 PM »
its been awhile since I started this thread, but I'm going to be adding 3 #208 KTU's to my system. now that I got everything rewired, I'll be able to expand.... I was looking at the relationship connections for the 207, 208 and 212.... since I'm adding 3 208's do all the #25 connections need to be tied together? (1A1 manual, Pg 45, figure 24) Once I get the third unit, I'll be able to start wiring them together. My main concern is the common wiring for all 3 of the units, besides the power sources, what needs to be wired together commonly?
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