Apartment in Moscow code 495 on a modern PBX.
Elderly ancestors with the disk apparatus to rasstavatsya don't want to.
The line at the entrance to the apartment is passed through a LinkSys SPA3102 with the aim of, hopefully, a clear.
If the power to the SPA off, then pulse dialing through it into place, but if the power there is, is only tone. Google claims that the SPA is no config to get to recognize pulse dialing. :(
The solution from KO:
— change apparatus of the ancestors (both much in 80 years) — does not roll, a more expensive.
— change SPA — sorry for the money spent and hours configuring VoIP routing.
— divorce ancestors in parallel — do not roll in terms of routing.
What to do?