ATAs and REN

Pardon my ignorance....

What is the REN of a typical FXS port on an ATA? Are multiple FXS
ports (where provided) to allow support for multiple service providers
(one per port) or to support multiple phones on one service?

Or perhaps both depending on config??

TIA,

 

The SPA-3000 is noticably lower REN than my BT line. It struggles
to ring all the phones, whereas the BT line has no problem at all.
I am probably around a total REN of 4 though, maybe a little over.

There's a parameter "FXS Port Power Limit" which I've tried changing,
but it makes no difference I can detect. There's also a setting for
ring voltage, which I haven't tried changing yet (set to default 70V).

 

I read in a manual that one of mine was REN=5

the former. If you want 5 phones on one service you buy a stack of one
plug to 3 socket adapters or the like

possibly. Most two socket jobs run two accounts. There's a one
socket-two account device too.

Phil

 

The Sipura range (SPA-2000 etc. are typically REN 3 per port, as opposed
to 4 on a BT line.

Re. multiple ports, each is configurable separately in most cases.

Not usually, although the Fritz!Box Fon from AVM can be configured to
allow phones connected to both ports to ring simultaneously if a call
comes in on any or all lines connected, including a fixed (analogue or
ISDN) line.

Ivor

 

Try changing the ring voltage to 90v.

 

A BT line is a minimum of 4. Most BT lines will actually be
quite a bit higher, unless you are on a maximum length line
from the exchange.

(Fond memories of taking prototype telephone apparatus up
to Baynard House to get BT to tell us what REN number we
could stick on it... ;-)