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VoIP How to: Voice reinjection: Difference between revisions
Add some warning text, and make it clear that this is for the MK4 VDSL SSFP
(Reassemble and use) |
(Add some warning text, and make it clear that this is for the MK4 VDSL SSFP) |
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=== Modifying the VDSL SSFP ===
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.
These modifications need some degree of technical know-how, and you might need to consult someone
[[ File: VDSL_SSFP_dismantled.jpg]]
* Two components need to be removed, and it's recommended to remove a third one. The components to remove are labelled PS1 and PS2 on the circuit board - they may be orange in colour, and can be removed by
* It's optional to remove a third component - the resistor labelled R6. The VDSL SSFP doesn't use the bell capacitor in the NTE5c - it provides its own bell capacitor (labelled C8). R6 connects the bell capacitor to the telephone socket, but we're now using the telephone socket as an input from the ATA and so R6 isn't needed and might cause confusion if ringing ever came down the lead from the ATA. On the other hand, with R6 still in place one could use a 2 to 1 adaptor in the phone socket and plug in a local handset. One could always compromise and just disconnect one leg of R6...
[[ File: VDSL_SSFP_pcb.jpg]]
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