UC560 Auto attendant calling fxs extension

Question

Hi,
I have an UC 560 with an autoattendant working fine, but when from the pstn need to call to an extension of a analog extension in a FXS port it says that is not a valid extension.
If i check the option: "Allow external transfers" for the autoattedant it works, but in the told fraud prevention practice don´t recommended.
Is required this option to allow the call to the fxs port direct from pstn or what can be wrong in configuration?
Regards,

Answer 1

Hello John,
The configuration for the fxs port is:
voice-port 0/0/0
station-id number 115
caller-id enable
dial-peer voice 1 pots
corlist incoming user-local
translation-profile incoming CallBlocking
destination-pattern 115
port 0/0/0
no sip-register
If i assign a option in the autoattendant to call the extension this work, but i need to call directly to the extension
The prompt messages says: "if you know the extension number, please dial it"
In that moment if i call any sscp extension it works, but calling the extension of the fxs port says that is invalid
I did a test calling directly a hunt group extension with the same effect.
To ilustrate:
FXS extension: 115
Hunt Group Extension: 170
With no allowed external transfer:
Call to AA and dial 115 -> No works
Call to AA and dial 170 -> No works
Assign 1 number of AA to 115, and 2 number to 170
Call to AA and dial 1 -> works
Call to AA and dial 2 -> works
With allowed external transfer:
Call to AA and dial 115 -> works
Call to AA and dial 170 -> works
Assign 1 number of AA to 115, and 2 number to 170
Call to AA and dial 1 -> works
Call to AA and dial 2 -> works
I hope to be clear,
Regards