Telephone line impedance matching

John Rumm · 2010-07-13T18:16:54+00:00

I have an analogue PABX which was probably designed with the US market in mind. It all works nicely but for two issues...Firstly its exchange line impedance probably does not exactly match that provided by our (very very long) phone lines. This can result in some calls being a bit "quiet". Secondly, the poor thing gets confused by the automated BT line tests and rings once in response to a test (it also rings if you unplug the line from the master socket).Is anyone aware of a gizmo that one can interpose betwixt line and PABX to improve the matching, and hopefully stop it sensing the brief disconnection from the lines during a test?Ready made gadget or circus diagram would do...