Here is the issue. There is clearly a network protocol interference problem between the OOMA Telo and the Canon Imageclass MF8350CDN printer. This happens even with the fax line from the printer completely disconnected. I initially thought it was a power voltage drop issue, but the symptoms below prove it is a network interference issue and not a power issue.
INTERFERENCE BETWEEN TELO AND PRINTER; when a call comes in, there is a relay in the printer that audibly clicks. When the call is finished, there is another printer audible relay click. So there is interference/crosstalk between the OOMA Telo and the printer.
INTERFERENCE BETWEEN PRINTER AND THE TELO: When I print, the Telo sometimes goes into “do not disturb” mode. If I am on a call when I print, sometimes the ongoing call will go dead and the person calling in will be instantly directed to my voicemail (with voicemail message). So there is interference/crosstalk between the printer and the OOMA Telo.
Clearly, OOMA needs to do some work in their IP protocols; the more people who use Canon Imageclass printers along with OOMA will probably have this issue; support just doesn't seem to understand and they seem uninterested in addressing this issue. .
Please stop posting NEW threads for this same issue.
Telo2 upgrade (hub retired) October 2016
Service Level: Core