CCM 3.3

julienf28 · ‎11-26-2007

We are getting Voice Spam on our VoIP systems. We're currently using Cisco Call Manager 3.3

Is there any ways to block incoming calls from an outside source?

Rob Huffman · ‎11-26-2007

Hi Julien,

This is possible if the Gateway uses H.323, there is no way using MGCP :( Many have tried .........

Mahesh @ Cisco

http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Unified%20Communications%20and%20Video&topic=IP%20Telephony&CommCmd=MB%3Fcmd%3Dpass_through%26location%3Doutline%40%5E1%40%40.1ddf8746/2#selected_message

TAC Case from Jorge

http://www.ciscotaccc.com/kaidara-advisor/voice/showcase?case=K15182736

Another good related thread (answers from both Mahesh and Jorge)

http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Unified%20Communications%20and%20Video&topic=IP%20Telephony&CommCmd=MB%3Fcmd%3Dpass_through%26location%3Doutline%40%5E1%40%40.1ddf1257/5#selected_message

Hope this helps!

Rob

julienf28 · ‎11-26-2007

This helps a lot except I've taken look at our gateways and they are indeed MGCP :( So that said, I will do some more research on my part but would you know what it would take to switch from MGCP to H.323?

Thanks

Rob Huffman · ‎11-28-2007

Hi Julien,

This would be a very complicated (but not impossible) change due to the way H.323 is configured.

Adding a Cisco IOS H.323 Gateway

Follow these procedures to add a Cisco IOS H.323 gateway to Cisco CallManager.

Before You Begin

Before configuring a Cisco IOS H.323 gateway for use with Cisco CallManager, you must configure the gateway by using the Cisco IOS command-line interface (CLI). Compared to MGCP gateways, H.323 gateways require more configuration on the gateway because the gateway must maintain the dial plan and route pattern.

http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_administration_guide_chapter09186a00802deb06.html#wp1311511

I might be tempted to speak with your service provider to see what they can do before I went this route :)

Hope this helps!

Rob