>From Wikipedia, the free encyclopedia Ringer equivalence number In telecommunication, a ringer equivalency number (REN) is a somewhat arbitrary number which denotes the loading a telephone ringer has on the line. In the U.S., this is determined in accordance with the Code of Federal Regulations, Title 47, part 68.
A ringer equivalency number of 1 represents the loading effect of a single "traditional" telephone ringing circuit, such as that within the Western Electric Model 500 desk telephone. Note that modern telephone equipment may have a REN significantly lower than 1: as a rough guide, externally-powered digital-ring phones may have a REN as low as 0.2, while modern analog-ring phones (where the ringer is powered from the phone line) typically have a REN around 0.8. The total REN for a subscriber's line is simply the sum of the RENs of all devices connected to the line; this number expresses the overall loading effect of the subscriber's equipment on the central office ringing current generator. The local telephone company usually sets a limit on the total REN, typically 5 or less. Henry L.Coleman CEO *VoIP-PBX* 1-866-415-5355 Toronto Ontario Canada > I am trying to get some ATA adaptors for my existing analogue phones and > wonder if how many analogue phones (connected in parallel) I can connect > to one of these adaptors. > e.g., Linksys SPA-1001 or other similar ones. Currently, I have 3-4 > phones connected to my analogie bell line - so all phones in the house > ring when there is an incoming calls. > > I wonder if connecting muliple phones to one ATA might blow it up? > > Thanks, > Richard
