Cisco ATA 188 with Fax

Unanswered Question
Jul 9th, 2008

Any idea on how to configure the cisco ATA 188 for fax? Cus I have problem sending and receiving fax, but I can make and received calls without problems.

I attach the cisco ATA configuration.

I have this problem too.
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Ayodeji Okanlawon Wed, 07/16/2008 - 02:29

Your audio mode and connect mode settings are wrong...

Configuring the Cisco ATA for Fax Pass-through mode

Fax Pass-through mode requires configuring two configuration parameters:





The AudioMode parameter is a 32-bit value. The lower 16 bits apply to the Phone 1 port of the Cisco ATA and the upper 16 bits apply to the Phone 2 port of the Cisco ATA.

Your audio mode for fax pass throuhg for port1 of the ata should be


and for port 2 of the ata 0x0015XXXX

Your connect mode settings should be...



The ConnectMode parameter is a 32-bit value. The parameter settings apply to both lines of the Cisco ATA. Configure ConnectMode after configuring AudioMode for fax pass-through mode. Cisco recommends you use the following ConnectMode setting to interoperate with a Cisco IOS gateway.

Recommended Setting


Alejandro Corte... Wed, 07/16/2008 - 07:22

Hi in this parameter:

Your audio mode for fax pass throuhg for port1 of the ata should be

"0xXXXX0015" the "X" must be "X" or it means that I should replace the "X" for another number?

Ayodeji Okanlawon Wed, 07/16/2008 - 02:21


You dont specify the cisco ATA in a dial-peer.

You configure the ATA in call manager and then you create a dial-peer with its destination-pattern as the directory number of the ATA and session target as callmanager IP address.


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