View single post by slychiu
 Posted: Sunday Oct 18th, 2020 03:13 am
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slychiu



Joined: Saturday Apr 29th, 2006
Location: Singapore
Posts: 5055
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On CM9001, the DSI01 plug in submodule includes the Ringer, Door station Mic/Voice, and Local Telephone support circuits, see http://www.cytech.biz/product_details.php?item_id=498 which includes the DSI01 manual download.


This offloads the circuits and makes the CM9001 lower cost for those who do not need these features

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