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New Member

Default Output Attenuation on a FXO port?

We've got a 2651 with four FXO ports in it. PSTN callers complain of low volume. The command reference says the default output attenuation on an FXO port is 0, but our ports are all at 3, and I know we didn't change the setting.

Is the default output attenuation supposed to be 0 ?


Re: Default Output Attenuation on a FXO port?

The default is zero, and normally it is only raised to combat an problem with echos.

New Member

Re: Default Output Attenuation on a FXO port?

I had the same problem with aour 2600, although we weren't using FXO ports. However, by setting the output attenuation to -6 (the maximum), this boosted the volume to the PSTN callers to a normal level. You may be ok with -2 for example, so you'll need to try a few of the settings out. Remember to bounce the port after making the change.

NB When i used the 'no output attenuation' command, the output attenuation showed a value of +3.

Also, check the ios you are using. There is a known bug with 12.2T releases.


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