[cisco-voip] alt-battery-feed feed2 question

[Norton, Mike]

The discussion in that link is about phantom power for microphones in the pro audio world, not about phone lines in the telecom world. IIRC, phantom power is usually defined as 9-52 V but is almost always 48 V in practice. Wonder if telecom definitions are the same way, where technically a wide range is supposed to be allowed but industry has settled on a more specific value and if you don’t follow it can cause interop issues.

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Mike Norton
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From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Lelio Fulgenzi
Sent: November-01-10 1:35 PM
To: Fuermann, Jason
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] alt-battery-feed feed2 question

This has reference to a standards body article number.

http://www.gearslutz.com/board/so-much-gear-so-little-time/327783-phantom-power.html



Sent from my iPod

On Nov 1, 2010, at 3:27 PM, "Fuermann, Jason" <JBF005 at shsu.edu<mailto:JBF005 at shsu.edu>> wrote:
Does anybody know where the 48V standard came from/is listed. I searched for it at one time but was unable to find any standard listed. I just know that’s what I’ve always been taught, and that’s what ATT sends us (actually, I’ve seen between 46-50V from ATT). I also recall hearing that the range was larger than that, something like 42-54V. 46V usually gets the job done though

From: Lelio Fulgenzi [mailto:lelio at uoguelph.ca]
Sent: Monday, November 01, 2010 1:59 PM
To: Fuermann, Jason
Cc: James Buchanan; Kevin Damisch; cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>
Subject: Re: [cisco-voip] alt-battery-feed feed2 question

Cool. But still below the 48V standard. ;)

Good to know though.

---
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: "Jason Fuermann" <JBF005 at shsu.edu<mailto:JBF005 at shsu.edu>>
To: "Lelio Fulgenzi" <lelio at uoguelph.ca<mailto:lelio at uoguelph.ca>>
Cc: "James Buchanan" <jbuchanan at presidio.com<mailto:jbuchanan at presidio.com>>, "Kevin Damisch" <kevin.damisch at vitalsite.com<mailto:kevin.damisch at vitalsite.com>>, cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>
Sent: Monday, November 1, 2010 2:57:03 PM
Subject: RE: [cisco-voip] alt-battery-feed feed2 question

It up's the voltage on the port for devices that want high voltage to operate. If I remember correctly, it brings it to about 46V.

-----Original Message-----
From: Lelio Fulgenzi [mailto:lelio at uoguelph.ca]
Sent: Monday, November 01, 2010 1:10 PM
To: Fuermann, Jason
Cc: Buchanan, James; Kevin Damisch; cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>
Subject: Re: [cisco-voip] alt-battery-feed feed2 question

Curious.  What does this do?

Sent from my iPod

On Nov 1, 2010, at 2:08 PM, "Fuermann, Jason" <JBF005 at shsu.edu<mailto:JBF005 at shsu.edu>> wrote:

> We do the same thing, but not on all 24 ports, just the one's demanding it. We haven't seen any problems stemming from it. Let us know if you run into anything though.
>
> -----Original Message-----
> From: cisco-voip-bounces at puck.nether.net<mailto:cisco-voip-bounces at puck.nether.net> [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Buchanan, James
> Sent: Thursday, October 28, 2010 4:05 PM
> To: Kevin Damisch; cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>
> Subject: Re: [cisco-voip] alt-battery-feed feed2 question
>
> Hello,
>
> I have a customer doing this to accommodate auto dialers in defribulators with no issues.
>
> Thanks,
>
> James Buchanan | Technology Manager, UC | South Region | Presidio Networked Solutions
> 12 Cadillac Dr, Suite 130, Brentwood, TN 37027 | jbuchanan at presidio.com<mailto:jbuchanan at presidio.com>
> D: 615-866-5729 | F: 615-866-5781 | www.presidio.com<http://www.presidio.com>
> CCIE #25863, Voice
>
>
> -----Original Message-----
> From: cisco-voip-bounces at puck.nether.net<mailto:cisco-voip-bounces at puck.nether.net> [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Kevin Damisch
> Sent: Thursday, October 28, 2010 1:19 PM
> To: cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>
> Subject: [cisco-voip] alt-battery-feed feed2 question
>
> Any issues with configuring the "alt-battery-feed feed2" command on all 24 ports of a VG224?  Customer is questioning the power supply ability in doing this for all ports.
>
> Thanks,
> Kevin
>
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