UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

julie_m · 16th Feb 2009, 5:27 pm

The ringing wire (pin 3) needs to be shorted to pin 5 whenever the phone is off the hook, to suppress tinkling caused by LD dialling pulses. However, ADSL filters regenerate the pin 3 signal locally (and with only enough oomph to ring one phone). So I'm afraid the only way to suppress tinkling when ADSL filters are in use, is to use DTMF

16th Feb 2009, 5:27 pm	#4
julie_m Dekatron Join Date: May 2008 Location: Derby, UK. Posts: 7,735	Re: More Bell Tinkle The ringing wire (pin 3) needs to be shorted to pin 5 whenever the phone is off the hook, to suppress tinkling caused by LD dialling pulses. However, ADSL filters regenerate the pin 3 signal locally (and with only enough oomph to ring one phone). So I'm afraid the only way to suppress tinkling when ADSL filters are in use, is to use DTMF __________________ If I have seen further than others, it is because I was standing on a pile of failed experiments.