northeaster
Technical User
I'm trying to use the I-ATA at DN-237 for a fax machine. It's on a hotline for outgoing on any of the three lines in pool A. For incoming it is the only station set for appr&ring on line 3. Anyway, I think the programming is all working right. My problem is the ring voltage on the I-ATA. Outgoing with the hotline works fine. If I make an intercom or outside call to 237 the caller just hears endless ringing and 237 hears no ring. But if you pick up 237 the call connects. I've tried four different phones: an old 500, a new vtech cordless, a new Radio Shack trimline-type, and a new HP fax machine. None of them will ring. They all work fine on the CO line. So, I put a volt meter on the Y/S pair and tried calling, and it just shows *very* brief spikes of AC. Pairs of spikes, showing between 30 and 90VAC (up from zero, of course), but just split-second duration spikes. It's a new digital meter that I'm not too familiar with so I put it on a POTS line to see what it would read, and it shows a good solid 3 seconds of about 90VAC. Also, on the POTS line, it shows the DC voltage going up from about 48 to about 58 for ringing, but the I-ATA goes a bit wild there. I don't know if it makes any difference, but the DC goes from about 31 battery to 112 in the same pairs of brief spikes. It's only a three foot cable, but in the name of thoroughness I put an ohmmeter on the Y/S pair in the female amphenol connector. With the jack at far end open I get infinite resistance, and with it shorted I get zero. Is my system defective, or is the I-ATA a weak feature? Or something else? I already tried the ATA setting for modem and for telephone, though it sounds like that doesn't apply to POTS.
Thanks in advance!
Thanks in advance!
