I have some confuse for which Cisco ATA I should order ATA186-I1-A or ATA186-I2-A?
I have captured the below text from Cisco web site:
"The Cisco ATA186-I1 and Cisco ATA188-I1 provide 600-ohm resistive impedance. The Cisco ATA186-I2 and Cisco ATA188-I2 provide 270 ohm + 750 ohm // 150-nF complex impedance. The impedance option is requested when you place your order and should match your specific application. If you are not sure of the applicable configuration, check your country or regional telephone impedance requirements."
This is exactly my problem, which one I should go for the 600-ohm or the complex impedance one?
Its almost impossible to get this information from the telephone service provider, is there any reference that I can use to till the right ATA to use in Saudi Arabia.
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