blocking inbound sip robo calls

[sentrex]

I installed 4 vvx150 and my client keeps receiving inbound sip robo calls,these calls are not coming from their did # apparently theres is a setting that i have to block for these calls to stop.

i was told its in the phone settings and not thru the carrier, 

Thanks 

[SteffenBaierUK]

Hello @sentrex ,

Welcome to the Poly Community.

From our FAQ:

Oct 24 2014 Question: How can I prevent Ghost calls or tools like sipvicious or nuisance Cisco calls ringing my phone?

Resolution: Please check => here <= or Security Center: Security Bulletin Relating to Worldwide Botnet Dialing H.323-Capable Systems

Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.

Best Regards

Steffen Baier