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external calls with PSTN

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kattoussa

kattoussa

Technical User
Apr 19, 2013
53
TN
hello,
i have a cisco unified communication UC520 system connected to 3 cisco ip phones. i connect the PSTN port FXO to PSTN line. when i tried to call an external number from an ip phone i can't only when i define a CO line in the phone and i can't define in it a restricted permission. how can i define a prefix in cisco which permit me call external number from any ip phone and define restriction without CO lines and button assignment? thanks
 
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