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How to avoid ANI Spoofing


hasa
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Hi all,

 

Am using Vodia V5 server since last one year, with couple of domains and extensions. already set outbound ANI for every extensions and those assigned to our users. Now let me know

 

1 ) Is it possible those user can change the Outbound caller id (ANI) using from Phones apart from server settings

They are using different IP phones like Snom, Grandstream etc

 

2 ) If user can spoof the outbound caller id using any method how can i prevent ?

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