said by lutful:You mentioned the 965 earlier. What brand/model do you recommend?
For a POTS or circuits tech shooting the MG's trouble, the 965 DSP is really all that is needed its simple and intuitive and will serve a field tech very well for 90% of what they come across.
The 965DSP is literally testing for cavemen.
If the MG's trouble becomes a chronic, then you bring in say a HST-3000 and using that device as a DVOM you can stress the pair, the JDSU does this by pulsing the pair with 200+ VDC and measuring the resistance under the higher voltage and the lower voltage, a large difference between the two fails the test, this test also because of cable capacitance has the tendency to fuse open high opens making menu selection 2 a lot easier to use..
Anyway, I am curious what (non-TDR) tool you will personally consider for testing the loop when you have access to ring/tip only from TheMG residence? That is a very relevant question.
That depends, if a tech has CO coverage then the best way is head to head testing, lacking CO coverage, I personally would recommend placing the JDSU FED at the customers prem and going to the CO or the RTs protector field and doing a full wideband test.
Now that may seem like overkill for a audio circuit and I may burn up a few pairs in the process, but I will deliver to the end user a loop that will last.