I encounter a problem with a VG224. The idle voltage is 19V or 39V, according to "idle-voltage" parameter (high or low).
But during a call, the voltage is 10,4 v at the back of the VG, and less than 10v if my phone if my analog phone is a little bit far.
Some analog equipments (intercoms for lift for example) do not work well in this condition. What can I do to increase voltage of the port during the communication ?
Thanks in advance.