[cisco-voip] Dry Closure Phones

[Eric Butcher]

It is a signaling method really.  Some systems use dry contact alone with no audio pair.  Other systems, such as some paging systems, use it for signaling to open and close an audio channel on a second pair of wires.


Eric Butcher
Cisco Unified Communications Engineer
CDW Professional Services
11711 N Meridian, Ste 225
Carmel, IN  46032
• 317.569.4282 - IP Phone
• 765.744.1458 - Mobile
• eric.butcher at cdw.com<mailto:eric.butcher at cdw.com>
http://www.cdw.com/


From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Lelio Fulgenzi
Sent: Tuesday, November 23, 2010 1:40 PM
To: Neal Haas
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Dry Closure Phones

ok....maybe i was thinking of clean room phones.

http://en.wikipedia.org/wiki/Cleanroom

the dry contact, closure if for triggering external actions then?

---
Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Cooking with unix is easy. You just sed it and forget it.
                              - LFJ (with apologies to Mr. Popeil)

________________________________
From: "Neal Haas" <nhaas at co.fresno.ca.us>
To: "Lelio Fulgenzi" <lelio at uoguelph.ca>, "David Zhars" <dzhars at gmail.com>
Cc: "cisco-voip at puck.nether.net" <cisco-voip at puck.nether.net>
Sent: Tuesday, November 23, 2010 1:29:22 PM
Subject: RE: [cisco-voip] Dry Closure Phones


Correct me if I am wrong, Dry Closure or Contact is not for the phones itself, but that allow you to run bells or chimes, or door openers. I have read about Valcom units doing this for stuff like Door openers. I am looking into it but try out (http://www.valcom.com/techsupport/ip_solutions/ip_intercomdoorphones.htm). Stab at the correct web page, but it is at this web site or call them and ask.

Neal Haas

1020 S 10th St
Fresno, CA  93702
Desk 559.600.5890

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Lelio Fulgenzi
Sent: Tuesday, November 23, 2010 10:15 AM
To: David Zhars
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Dry Closure Phones

From what I understand, dry closure or contact has to do with the isolating of any electrical equipment from the atmosphere. For example, if you were working in an area with volatile gases, you'd want a dry contact telephone. I think this is only available in analog sets for now, so you might have to deal with a VG22x gateway that registers to SRST and feeds the analog dry contact phone.

---
Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Cooking with unix is easy. You just sed it and forget it.
                              - LFJ (with apologies to Mr. Popeil)
________________________________
From: "David Zhars" <dzhars at gmail.com>
To: cisco-voip at puck.nether.net
Sent: Tuesday, November 23, 2010 1:10:50 PM
Subject: [cisco-voip] Dry Closure Phones

An app we are installing at our Police Dept requires the phones to have a "dry closure" contact or something like that.
If I google this, I see a Dry Closure thing for 2600/3600 series, so I am researching that.
Do any phones supported by CCM 8 support dry closure?  Ultimately, I want the phones to work with SRST, so I probably don't want to stray too far from the Cisco wagon...

Appreciate any insight.

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