22A-49 Apparatus unit?

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22A-49 Apparatus unit? #525229 03/29/12 08:53 AM
Joined: Feb 2010 Posts: 80 southwest Missouri Telxonator Member
Telxonator Member Joined: Feb 2010 Posts: 80 southwest Missouri	I stumbled upon this little device today, and since it was Bell System, decided it needed a place in my collection. Any ideas what it was designed to do? Front [img]https://www.flickr.com/photos/phone-man/7027719315/[/img] Back of unit [img]https://www.flickr.com/photos/phone-man/6881621064/[/img] The long metal component says "Danger high pressure, do not open 337A WE" Any Ideas? Will G.

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Re: 22A-49 Apparatus unit? #525230 03/29/12 10:57 AM
Joined: Feb 2010 Posts: 80 southwest Missouri Telxonator Member
Telxonator Member Joined: Feb 2010 Posts: 80 southwest Missouri	Since the images didn't seem to load, go to my Flickr page to see them www.flickr.com/photos/phone-man Sorry for any inconvenience! Will G.

Re: 22A-49 Apparatus unit? #525231 03/30/12 11:38 PM
Joined: May 2011 Posts: 29 U.S. WECo 355A Member
WECo 355A Member Joined: May 2011 Posts: 29 U.S.	7A Communications System * Com-Key * 718 Key Telephone System 22A -49 Apparatus Unit is an external signaling circuit that activates a signaling device which is external to the telephone sets. O22A -49 Apparatus Unit offers a contact closure or opens a contact as required to operate KS-16301 type signaling devices (Section 463-110-100) or other external alerting devices. This unit is 1-13/16 deep by 2-3/4 inches high by 4-3/8 inches long and is wall mounted externally to the 570-type KSU. Connections are made on six screw terminals. The 22A -49 Apparatus Unit may be used to activate an external signaling device for: Common Audible Station Codes CO/PBX Ringing Ring Transfer

Re: 22A-49 Apparatus unit? #525232 03/31/12 02:59 AM
Joined: Sep 2006 Posts: 3,290 Shelter Island, New York Arthur P. Bloom Member
Arthur P. Bloom Member Joined: Sep 2006 Posts: 3,290 Shelter Island, New York	Quote The long metal component says "Danger high pressure, do not open 337A WE" It's a relay. The " -49 " (a color suffix) in the part number means "light olive gray" referring to the plastic cover. Arthur P. Bloom "30 years of faithful service...15 years on hold"

Re: 22A-49 Apparatus unit? #525233 03/31/12 04:45 AM
Joined: May 2007 Posts: 5,058 Likes: 5 NYC Silversam Moderator-1A2, Cabling
Silversam Moderator-1A2, Cabling Joined: May 2007 Posts: 5,058 Likes: 5 NYC	So it's like a Wheelock for a Comkey. Thanks, Arthur! Your knowledge is encyclopediac..... Sam "Where are we going and why are we in this hand basket?"

Re: 22A-49 Apparatus unit? #525234 03/31/12 06:33 AM
Joined: Sep 2006 Posts: 3,290 Shelter Island, New York Arthur P. Bloom Member
Arthur P. Bloom Member Joined: Sep 2006 Posts: 3,290 Shelter Island, New York	Thanks, Sam, although 355A was the person who posted the BSP reference. This unit, unlike the Wheelock family of generator-driven auxiliary relays, uses (I believe) other low-voltage signals to do the same tasks. I believe that the "turkey tone" audible signal, or maybe a ground, is used to activate it, but I have not seen the BSP in 25 years so I can't be sure. Arthur P. Bloom "30 years of faithful service...15 years on hold"

Re: 22A-49 Apparatus unit? #525235 03/31/12 12:23 PM
Joined: Sep 2006 Posts: 3,290 Shelter Island, New York Arthur P. Bloom Member
Arthur P. Bloom Member Joined: Sep 2006 Posts: 3,290 Shelter Island, New York	Please delete Arthur P. Bloom "30 years of faithful service...15 years on hold"

Re: 22A-49 Apparatus unit? #525236 03/31/12 12:48 PM
Joined: May 2011 Posts: 29 U.S. WECo 355A Member
WECo 355A Member Joined: May 2011 Posts: 29 U.S.	The information regarding the 22A apparatus unit was extracted from the third volume of the Key Systems (ComKey) Service Manual. Perhaps a scanned version is available in the TCI Library or from Sam Etler or one of the other scan contributors.

Re: 22A-49 Apparatus unit? #525237 03/31/12 03:56 PM
Joined: May 2007 Posts: 5,058 Likes: 5 NYC Silversam Moderator-1A2, Cabling
Silversam Moderator-1A2, Cabling Joined: May 2007 Posts: 5,058 Likes: 5 NYC	Thank you WECo 355A! My apologies. I'm so used to Arthur coming up with the obscure WE info.... I never worked for Bell so my knowledge of WE proprietary products is somewhat limited. Arthur - Yea, I realize that it wasn't using Ring Generator, just that it provided the same functionality. Sam "Where are we going and why are we in this hand basket?"

Re: 22A-49 Apparatus unit? #525238 03/31/12 06:53 PM
Joined: May 2011 Posts: 29 U.S. WECo 355A Member
WECo 355A Member Joined: May 2011 Posts: 29 U.S.	From the TCI Library- 518-450-102 i4 Feb81 14A Communication System ~ Comkey 1434 Identification, Installation, Connection, Operation and Maintenance. 21MB. Issue 4, February 1981, 236 pages. Contributed by Sam Etler. https://tinyurl.com/7u73kbs Connection details for the 22A are shown on pages 53 to 57.

Re: 22A-49 Apparatus unit? #525239 04/01/12 12:23 PM
Joined: Feb 2010 Posts: 80 southwest Missouri Telxonator Member
Telxonator Member Joined: Feb 2010 Posts: 80 southwest Missouri	Thanks for the info! It came out of a factory, so it makes sense they would need some type of signalling system for a noisy environment. WECo, thanks for the link to the PDF, I don't think I have that one in my PDF library of BSP's. Thanks again for the help! Will G.