How many phones can you hook up to one line?

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TimT847:
Just installed my Obi202...I connected the device to all 7 telephone jack in the house.  However, when I plug in the 7th phone all the phones do a quick ring, not the normal long ring.  Is there a limit to how many phones are connect to 1 port/trunk?  Is there a way to change this quick ring to something longer?

drgeoff:
It depends on the phones.

Read https://en.wikipedia.org/wiki/Ringer_equivalence_number

The OBi spec is 5 REN.

If the change from normal ring to short ring happens merely by adding the 7th phone, adjusting the OBi will NOT remedy that.

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