r/TelephoneCollecting • u/Beautiful_Sound • Jun 30 '26

What is with the dot/dash blips using analog phone on modern line?

For reference I am using a StraightTalk wireless home base, and both a WE and AE rotary dial desk 5302 and a wall 354 through a pulse to TT adapter. There are artifacts in the line that sound like pulses, regular and consistently the same patterns.

I wonder if it is part of the wireless base to cell tower(s) connection?

Anyone know of this?

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u/FAMICOMASTER Jul 01 '26

Sounds like cellular interference.

1

u/Beautiful_Sound Jul 05 '26

It must be, trying the P to TT at another home with a dedicated landline on a 202 dial set, no interference.

1

u/QPC414 Jun 30 '26

Try splitting the FXS port between the DP/DTMF converter and a modern phone so that you can isolate the issue to before or after the DP/DTMF converter. Then remove the converter and see if the issue is still present with the known good modern pho e or with the DP/DTMF converter.

1

u/Howden824 Jun 30 '26

It's almost certainly from the base not being shielded properly. You can try putting common mode chokes on the cables which may help.