<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: arial,helvetica,sans-serif; font-size: 10pt; color: #000000'><span style="font-size: 13.3333px; background-color: rgb(255, 255, 255);">A customer of mine has a Mitel 3300 PBX. We deliver to them analog lines.</span><div style="font-size: 13.3333px; background-color: rgb(255, 255, 255);"><br></div><div style="font-size: 13.3333px; background-color: rgb(255, 255, 255);"><br></div><div style="font-size: 13.3333px; background-color: rgb(255, 255, 255);">Everything worked fine for months, if not years. Then one day they say they can't receive inbound calls. They can still place outbound calls.</div><div style="font-size: 13.3333px; background-color: rgb(255, 255, 255);"><br></div><div style="font-size: 13.3333px; background-color: rgb(255, 255, 255);">They're on a Grandstream HT818 ATA. I move some lines to the Zhone ONT that's on-site. No improvement.</div><div style="font-size: 13.3333px; background-color: rgb(255, 255, 255);"><br></div><div style="font-size: 13.3333px; background-color: rgb(255, 255, 255);">I plug in a normal analog handset from Walmart or Menards. They all ring and answer just fine.</div><div style="font-size: 13.3333px; background-color: rgb(255, 255, 255);"><br></div><div style="font-size: 13.3333px; background-color: rgb(255, 255, 255);">I plugged in a patch cable from their Mitel ONS2 to the analog trunk 5 and they set up an extension on that ONS2 so that a call to it would trigger an inbound call on their analog line. Apparently that worked.</div><div style="font-size: 13.3333px; background-color: rgb(255, 255, 255);"><br></div><div style="font-size: 13.3333px; background-color: rgb(255, 255, 255);">The Mitel support agent is saying that we're not sending them between 24v - 48v.</div><div style="font-size: 13.3333px; background-color: rgb(255, 255, 255);"><br></div><div style="font-size: 13.3333px; background-color: rgb(255, 255, 255);">All cables are 6' at most.</div><div style="font-size: 13.3333px; background-color: rgb(255, 255, 255);"><br></div><div style="font-size: 13.3333px; background-color: rgb(255, 255, 255);">A) I don't see anywhere to configure voltage on either platform.</div><div style="font-size: 13.3333px; background-color: rgb(255, 255, 255);">B) I don't know how it could work and then just stop, other than equipment failure.</div><div style="font-size: 13.3333px; background-color: rgb(255, 255, 255);">C) I don't know how it would work just fine on a COTS phone, but not their Mitel.<br>D) I don't know how the same problem could also afflict another ATA (build into the ONT).<br><br><br>Any tips?</div><div><br></div><br><div><span name="x"></span><br><br>-----<br>Mike Hammett<br>Intelligent Computing Solutions<br>http://www.ics-il.com<br><br><br><br>Midwest Internet Exchange<br>http://www.midwest-ix.com<br><br><span name="x"></span><br></div><br></div></body></html>