[Date Prev][Date
Next][Thread Prev][Thread Next][Date
Index][Thread Index]
Re: Modem Caller-ID question (long-ish)
- To: ukha_d@xxxxxxx
- Subject: Re: Modem Caller-ID question (long-ish)
- From: nigel@xxxxxxx
- Date: Thu, 16 Nov 2000 07:27:02 -0000 (GMT)
- Delivered-to: rich@xxxxxxx
- Delivered-to: mailing list ukha_d@xxxxxxx
- Mailing-list: list ukha_d@xxxxxxx; contact
ukha_d-owner@xxxxxxx
- Reply-to: ukha_d@xxxxxxx
>>Do you know wich two? - there are 4 connected pins in a line cord
>>aren't there?
> ISTR, US modems use the middle 2 of a RJ45, UK ones 2 and 6 of a BT
> jack.
I think you meant 2 and 5. 2 and 5 are the incoming pair from the
telephone exchange, the master socket derives a ring signal and puts
it on pin 3. Pin 4 is designated earth, and is rarely used in
domestic installations (used for earth recall on some pabx's), and 1
and 6 are spare.
Note that some phones derive the ring signal internally from 2 and 5,
so if you put in an extension and some phones ring but others don't,
you've probably not connected pin 3!
Nigel
-------------------------- eGroups Sponsor -------------------------~-~>
eLerts
It's Easy. It's Fun. Best of All, it's Free!
http://click.egroups.com/1/9699/3/_/2065/_/974378742/
---------------------------------------------------------------------_->
Home |
Main Index |
Thread Index
|