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VoIP How to: Voice reinjection: Difference between revisions
VoIP How to: Voice reinjection (view source)
Revision as of 14:28, 21 October 2018
, 21 October 2018Microfilters wired using pair 2 on the input side seem more common than I thought
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The following applies to the faceplate labelled ''Openreach MK4''. These instructions may not be suitable for later versions if introduced in the future.
'''Warning''' If you install a faceplate with these modifications, you will no longer have access to the voice channel on the copper pair for testing purposes. You would have to remove the modified faceplate and either use the test socket on the NTE5c or install a unmodified faceplate. '''Update''' there is an untidy way of gaining access, see below.
These modifications need some degree of technical know-how, and you might need to consult someone
Reassemble the VDSL SSFP and install it on the NTE5c. One can now simply connect the ATA phone socket to the phone socket on the VDSL SSFP with an RJ11 plug to BT phone plug lead. It doesn't need to provide a bell capacitor. A lead from an old modem (pre broadband) may be ideal.
====Gaining access to the voice channel on the copper pair====
This is an untidy solution, and relies on having the right parts to hand.
One needs an ADSL microfilter as supplied with modem/routers over the years. It needs to be of the type where the connection to the line is made with a short BT plug to an RJ11 plug (American style) - i.e. the microfilter has two RJ11 sockets on it, and one BT phone socket. One also needs an ''appropriate'' RJ11 plug to RJ11 plug lead. Remove the existing RJ11 lead from the VDSL SSFP, plug one end of the new RJ11 lead into the VDSL SSFP, and the other end into the 'line' connection of the microfilter. Now plug the free end of the old RJ11 lead into the microfilter, and ensure the modem/router regains sync. Now the phone socket on the microfilter is connected to the copper pair.
There is a gotcha regarding the wiring of RJ11 sockets. The VDSL SSFP uses pair 1 (pins 3 and 4) on the connection for the modem/router. I have two suitable microfilters, but they both have the RJ11 (or RJ14 ?) line socket wired using pair 2 (pins 2 and 5) instead (although the RJ11 out to the modem/router is wired as pair 1), so one needs a crossover RJ11/14 cable between the VDSL SSFP and the microfilter. It's easier if one has a box of spare microfilters and leads... the crossover cable would need to wire pin 2 at one end to pin 3 at the other end, 3 to 2, 4 to 5, and 5 to 4.
== Earlier NTE5 with MK3 VDSL Interstitial faceplate ==
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