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Old 27th Jul 2020, 6:15 pm   #4
OscarFoxtrot
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Join Date: Apr 2011
Location: Edinburgh, UK.
Posts: 767
Default Re: Why strap T5 to T6 in 700 series telephones?

The option may have been intended (whether used or not) for some plan systems where the ringer had to be rung (eg to signal an exchange call) even when the phone was in use (eg on an internal call).
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