| Quote from: artfulbodger |
| Before everyone jumps on the bandwagon and says "if it ain't broken, don't fix ... etc etc", but I was just thinking how bad DECT phones can be near a mastersocket/FTTC setup? |
Quite understand where you are coming from and wanting to optimise your setup and minimise risk of any interference issues.
You can usually leave the modem side of things alone, but a short twisted pair screened RJ11 cable for the modem can sometimes help if you do have real problems, but without any definite issue I would leave that side alone., except you mention a Mk3 plate, it has an improved Common-Mode filter - not a bad idea.
Some DECT setups do cause issues with Broadband and double filtering them has often cured those issues. Whether you want to try double filtering is upto you, but if you have Caller Display, check it works after you add a 2nd filter. On some rare occasions some filters have been known to mess it up.
There's a couple arrangements you could try here, it depends a bit on where you want to put your base station.
As you already have a filtered faceplate (part of the standard FTTC install) plug a second filter into the socket and then use a single twisted pair BT plug to BT socket extension lead and plug your existing phone lead into that. The disadvantage is that anything undesirable coming from the base station could still "leak" along that length of twisted pair (nothing is perfect). Also your base station has to be one that doesn't need the bell-wire (existing lead a single pair only). Also if it's not a single pair, you have a bell wire involved, which although filtered at the socket, only has a certain level of attenuation of the unwanted signals, but could also be a further radiating source if the bell wire from the DECT is actually used (some do, some don't).
Getting hold of a single twisted pair BT plug to BT socket could be tricky in any event.
A better arrangement would be to plug such a single twisted pair cable into the socket and have the filter at the far end and plug the DECT into that. But the potential benefits (if any) will depend on where you are locating the base station, how long and where it's own lead may be.
As far as the twisted pair cables go, you can get twisted pair BT plug to BT in-line socket but they aren't that common, but they will be 2-pair usually. You could then cut off the BT plug and crimp on another using the blue pair on pins 2 & 5 only.
You can get single twisted pair RJ11 plug to RJ11 plug, but you need to ensure the one you get has the correct 2 pins in use at the base station end and assuming it doesn't need the bell-wire. You can then cut off the plug at the other end and crimp on a BT plug again using only pins 2 & 5.
The other option you could consider is an extension phone socket wired to the faceplate with CW1308 twisted pair cable (blue pair only) and a filter plugged into the extension socket to give the double filtering and local bell wire in case the DECT needs it.
Hope that's of some help.
