Only 2 of 3 house phones work with OBI110, is there a max?

[noHatNoCattle]

In my house, I have 3 phones in 3 different rooms. I have the OBI110 "phone port" connected to a phone jack in my house.    Only 2 of my 3 phones work.  Is 2 the max number of phones that work with OBI110?  I found in the OBI110 documentation the following:

Maximum Ring Load                 5 REN (Ringer Equivalence Number)

Does that mean a maximum of 5 phones are supported?

Any ideas why my 3rd phone doesn't work (no dial tone)?

Thank you in advance for any help.

[HDFLucky]

If you disconnect one of the two working phones, does the third one then start working? If not, it suggests a wiring problem, or in the case of wireless phones, some issue with communicating between the handset and base. There is not a 1-to-1 relationship between number of phones and REN. There should be a label on the phone or a statement in the owner manual, specifying its REN value.

[noHatNoCattle]

If you disconnect one of the two working phones, does the third one then start working? If not, it suggests a wiring problem, or in the case of wireless phones, some issue with communicating between the handset and base. There is not a 1-to-1 relationship between number of phones and REN. There should be a label on the phone or a statement in the owner manual, specifying its REN value.

The phone that wasn't working is wireless the other 2 are wired phones.  Not sure why but after unplugging and plugging in the one wireless phone and one wired phone, all 3 phones work now !!

Thanks for the help HDFLucky !!

[zorlac]

FWIW, my obi100 drives 6 phones no problem.