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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>We have some ATAs connected to callboxes around a campus. The ATA is in the closet and the callbox is remote on a sidewalk.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Is there some exact tools your techs have to check for ground/wiring issues at the callbox out on the sidewalk?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We’ve had some callboxes that go offhook, then onhook, then offhook, then onhook. Since the ATA is setup for a CSS with PLAR it generates 3 calls to 911. We unplugged the GAI callbox and plugged a butt set out on the side walk and the same thing happened. I suspect the problem might be a bad ground/wiring issue but what tools can we use to prove that it’s a wiring issue instead of an ATA-187 issue?<o:p></o:p></p></div></body></html>