Quote:
Originally Posted by hamid_1
On the System X digital exchanges, there was a line tester available by dialling 175. (It may still be available, but I don't have an active phone line anymore to check.)
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On my BT landline 175 doesn't do anything, but 17070 confirms the line number and gives a list of options including ring back. I recall from when I worked at a location with a different provider, 17070 just gave the line number message then hung up.