Idle voltage on FXS ports on Cisco 2430 IAD

Unanswered Question
Nov 25th, 2008

We use the 2430 Cisco IAD to provide telephone connections to customer's phone systems via the FXS ports. The idle voltage on the IAD per line on the FXS ports are -36 to -38 volts.

The Bell Core standard is -44 to -50 volts. Is their a command to raise the voltage per line? The idle voltage setting is already set to high.

I have this problem too.
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rajackson Mon, 12/01/2008 - 06:20

I found a parameter that will raise the voltage 2 to 4 volts.

The parameter, alt-battery-feed, selection under the voice ports configuration. Changing this parameter to feed4 will raise the voltage 2 to 3 volts. It now reads -42 volts instead of -38 volts.

Thanks to our local Cisco Engineer for this one.


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