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Metallic line testing circuit design reference

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calvinhorng

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Hi Elektroda circuit designer:

Does anyone of you have experience on designing the Metallic line testing circuit fro both POTS/xDSL?

If you can give me some reference circuit or suggestion, I will really apprecate.

The testing items
(1) Line resistance
(2) Line capacitance (REN testing)
(3) Current
(4) DC/AC voltage
(5) DTMF generation/Detection
(6) Dial pulse generation
(7) Howler tone generation
(8) Modem/FAX tone detetion

Of course each PTT has their own requirement on the MT circuit
if you have any kind of official requirement, I would like to
have the hyberlink as well.

Thank you.
 

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