Bill H Posted October 29, 2013 Report Share Posted October 29, 2013 I have an older PBXNSIP CS-410 Version 3 system where someone, or more likely something (scanner), is trying to make calls to foreign countries.Since the customer does not make international calls I have blocked the International Calling Code of 011 and the telco service provider has also blocked it.That stopped that portion of the trouble.A SIP Trace shows that the calls were from an Unregistered Extension.What happens now is that these Unregistered Extension calls go to the first extension (Ext 221) in the CS-410 and end up in that persons mailbox as dead air.I did catch the IP Address of the scanner once and placed it in the Access Blocked Table, but it seems they change their IP Address to get around the blocking.I looked for a feature within the CS-410 to block Unregistered Extensions from making calls, but did not see anything that looked like it would do the job.My next and maybe last option is to block Access to everything except certain IP Addresses in the Access area.Does anyone have any additional ideas?Thanks. Quote Link to comment Share on other sites More sharing options...
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