Terry Streeter wrote: > [EMAIL PROTECTED] wrote: >> I haven't connected more than two handsets so I am not exceeding the >> magic 4 REMs (whatever they may be). > > It's actually REN not REM. Stands for Ringer Equivalence Number - and > is used to calculate the loading on the line. When there is an > incoming call, the exchange sends an AC signal (can't remember what > voltage, but may well be in the region of 30V to 50V) down the wire. > In the good old days this activated an electromagnet which caused the > bell in your telephone to ring. Too many phones connected caused too > much loading to the line and there wasn't enough signal left to make > the phone ring reliably. One old phone had a REN of one, and the GPO > set a maximum limit of four phones allowed to be connected to any one > line.
50V IIRC. Also with Broadband the bell wire (No.3) is superfluous. The lines coming in from BT, go to 2 and 5. In the master scocket there's a bit of circuitry to make the bell signal on line 3. The microfilter does not use line 3 at all. Each one has it's own "No.3 generator" for the phone outlet socket built into it. So if you have your extensions wired up with lines 2, 3, and 5 - then you actually add more noise to the line as the third wire acts like an aerial. I disconnected line 3 and got a 30% speed increase. Ron Jones Process Safety & Development Specialist Don't repeat history, unreported chemical lab/plant near misses at http://www.crhf.org.uk Only two things are certain: The universe and human stupidity; and I'm not certain about the universe. ~ Albert Einstein
