I have looked but can't find details of the impedance that the analogue PSTN interface card X100P presents. Am I right in assuming it is a resistive 600 ohm match? If so, is there anything I can do (in software or hardware?!) to 'tweak' its impedence to the complex impedence normally presented by a UK phone line?
The reason I ask is that old chestnut - echo...and I wonder whether resolving the impedence match might overcome some of the echo issues.
Rgds Tim Robinson Basingstoke, UK
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