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New Member

VG248 loop current increase

I'm looking for a device that will boost the loop Current on a VG248 port. I prefer something that is isolated, as it seems that the VG has a built-in Current Limiter of ~21.5ma. We keep running across situations, especially at colleges and universities, that are using Ramtel or devices for security phones (both dial and PLAR) that require 27+ma and 48+vdc.

We have tested with Sandman Viking(TBB-1) with no success. thanks.

3 REPLIES
Silver

Re: VG248 loop current increase

vg248 only gives 36V.If you need more, consider an IOS platform with vic-2fxs vic-4fxs/did or nm-hda with EM-8FXS depending on the port density you require.This will not provide feature parity witht the vg248 but will at least drive the phones.

New Member

Re: VG248 loop current increase

You can also consider the VG224. There is a 4pack bundle out as well for this product.

New Member

Re: VG248 loop current increase

I don't know if this will help any but we measured 50.1 VDC on the ATA188 device. It is a 2 phone port analog to digital black box.

We are currently trying to get our campus elevator phones, ADA Compliant, to work thru the VG248 and/or the ATA188 adn so far no luck.It appears that in this case voltage alone was not our final solution.

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