Author Topic: What network is this?  (Read 891 times)

Offline andre_janew

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What network is this?
« on: May 21, 2016, 06:08:57 PM »
Here are a couple of pictures of the network in my WE 1554:

Offline poplar1

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Re: What network is this?
« Reply #1 on: May 21, 2016, 08:53:28 PM »
Probably a 4010B network.

This is the same 4010-type network used in 702B Princess Phones. That's not surprising since the 1554 was actually the wall version of the Princess (similar network, hookswitch, ringer, and footprint--but lighted dials only in the rotary wall Prototypes).

Fig. 3 shows a 4010B network for the 1554B with 25A3 dial, and either a 4010B or 4010D with the 25W3 dial. The difference in the two networks is the dial filter between F and RR, which would have been needed for a rotary Princess, but not for a Touch-Tone set. Therefore, if the 4010B network is used, the green dial lead and the white line switch leads are connected to G on the network, rather than the usual F. F is used on the 4010D.

http://telephonecollectors.info/index.php/document-repository/doc_details/2820-502-502-101-i1-reference-1500d-1554b-telephone-sets-tl  (TCI library)

"C'est pas une restauration, c'est une rénovation."--François Martin.

Offline poplar1

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Re: What network is this?
« Reply #2 on: February 15, 2017, 12:34:59 AM »
Here is the link to a BSP in the TCI library showing various Western Electric networks, including drawings terminal layouts and schematics:

http://telephonecollectors.info/index.php/document-repository/doc_details/11940-c18-065-i4-sep62-induction-coils-networks-and-equalizers-ocr-r

425-type
4010-type
4228-type
« Last Edit: February 15, 2017, 05:25:37 AM by poplar1 »
"C'est pas une restauration, c'est une rénovation."--François Martin.