Euro Module Telephone Outlet BT Master Black is rated
Rated 3 out of
Pins numbered wrongly
This is compatible with the Axiom RJ45 wall outlets and faceplates, though it is a different white, and I can see that this could be a problem. In my case, I used an Axiom faceplate and a Euro Module telephone outlet slave and a Euro Module RJ45 with the Axiom faceplate, so the two modules are the same colour as one another even if they don't match the frame.
Toolstation customer services informs me that Euro Module isn't actually the brand, but that is how the catalogue and website lists this product, so I'll follow suit for the sake of consistency.
As others will probably comment, this is only held to the faceplate using a couple of clips and the cable cores connect via IDC terminals behind. If you hold the faceplate, the force applied to the IDC tool will tend to force the module loose, but all you need to do is support the module itself (rather than the faceplate) with your spare hand and it is not an issue. I don't remember using modular faceplates before and I got on with this alright.
It really is worth buying the spring-loaded IDC tool for this kind of job. This module did not come with a cheap non-sprung insertion tool, and I wouldn't really want to use one anyway as I have the correct tool. I had no issues with the IDC terminals, and they worked well with CAT 5e cable (which isn't what you'd usually use for this job, but, so long as you can terminate it, it probably better, if anything) than using normal telephone cable)
What did throw me, however, and wasted an awful lot of my time is that the IDC connector is mounted on a circuit board with the pins numbered incorrectly. They are numbered LOGICALLY (with the numbers on the socket corresponding with the numbers on the plug) rather than following a rather odd and very British convention.
As someone more erudite has put it, '[b]y a masterpiece of technical superiority between them the BSI and BT managed to number the 431A plug in the British Standard as a mirror image of the socket, so when inserted pin 1 on the plug goes to pin 6 on the socket, pin 2 to pin 5 and so on'.
I naively assumed that the numbers on this socket would correspond with the numbers on my other sockets as well as my Openreach (was BT) master socket and thus wasted much time with a multimeter trying to work out why the phones were behaving strangely. It turned out the problem was that the polarity of any phone plugged into this Euro Module was reversed because I had blindly followed the numeration, until I spotted the problem, pulled out all the wires, and started again. With some phones it might not matter, but with others you may not get a ring tone or be able to dial out if they are on different polarities. The black version of this has the same issue.
The product itself seems okay once you know the terminal numbering is 'wrong'. Can't comment on reliability as I only put it in today.
I did find it interesting that, unlike the RJ45 outlets, there appears to be no way to cable tie the cable to the back of the module, leaving the cable hanging on the terminals.
Date published: 2019-07-15