See https://www.ooma.com/forums/viewtopic.php?f=5&t=18281&start=10. Investigating this we’ve come across a number of telo’s that have a live landline plugged into the telo wall port (older telo’s still have this port).
Any customer for which any of the following is true should unplug the wire plugged into the telo wall port:
- the main number on your account is a number that has been ported to Ooma (and your port is complete)
- the main number on your account is an Ooma number that you selected when activating the account
Support calls a telo of this type a no-landline unit.
Not unplugging the wire from the wall port exposes your telo to any of the following:
Due to a bug the telo will crash any time a landline call is received (this bug is fixed in the patch).
A no-landline unit cannot receive a call of this type anyway.
It makes your telo more vulnerable to lightning strikes if you don’t have the landline plugged into
an adequate surge protector.