08-18-2008 05:55 AM - edited 03-15-2019 12:41 PM
I have a CME directly connected to the Internet. And i found out that someone is using my ISDN access to make calls. Who can i block outgoing calls that are not from registered phones?
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08-18-2008 04:27 PM
08-18-2008 06:01 AM
u can make restrection on the dial-peers and who is allwed to dial out or in with CME by using a nice feature called COR List
for detailed instructions see the following link:
http://www.cisco.com/en/US/tech/tk652/tk90/technologies_configuration_example09186a008019d649.shtml
good luck
please, if helpful Rate
08-18-2008 06:15 AM
Thanks for your help.
But i already have a corlist working. My question is if someone has some kind of softphone that is not configured on the CME, how can i be sure that he can not make the call.
Only the registered phones should be able to do so.
08-18-2008 06:23 AM
look at the following prevous issue which is similer but not same as urs
i am sure will be useful
the idea is to block all calls in all times and make exmptions to the phones registered with ur CME so only the phones u configre will be allowed to make calls
please, if helpful Rate
08-18-2008 08:20 AM
Thanks for your help.
I believe that was what the answer.
Best regards
08-18-2008 04:27 PM
good luck
Please, if helpful Rate
08-18-2008 08:46 AM
Am I naive in thinking that using the IOS firewall feature set in your CME router connected to the Internet would prevent this from happening?
08-25-2008 07:05 AM
I think that could do the trick.
The funny think is that i don't understand how they can make the call!
*Aug 25 12:18:06: //19899/xxxxxxxxxxxx/CCAPI/cc_api_caps_ind:
Call Entry Is Not Found
*Aug 25 12:18:06: //-1/E9D8D7E61217/CCAPI/cc_api_display_ie_subfields:
cc_api_call_setup_ind_common:
cisco-username=xxxxxxxxxxxx
----- ccCallInfo IE subfields -----
cisco-ani=xxxxxxxxxxxx
cisco-anitype=0
cisco-aniplan=0
cisco-anipi=0
cisco-anisi=0
dest=zzzzzzzzzzzzz
cisco-desttype=0
cisco-destplan=0
cisco-rdie=FFFFFFFF
cisco-rdn=
cisco-rdntype=0
cisco-rdnplan=0
cisco-rdnpi=-1
cisco-rdnsi=-1
cisco-redirectreason=-1 fwd_final_type =0
final_redirectNumber =
hunt_group_timeout =0
This is the first time this has happen to me.
I think that they are using a PC to make the outbound call.
08-11-2010 04:29 AM
Hi,
Did you ever solved this issue?
I think I'm having the same issue. I have a UC500 that started to make calls I don't know where they came from.
All calls have a calling number=0000 and they dial numbers around the world.
It seems the UC500 starts the calls itself...
Regards
08-11-2010 04:57 AM
You likely have CME exposed to the internet, they call via SIP or more rarely H.323.
Generally, this is easily addressed with an access-list.
08-11-2010 05:01 AM
Hi,
Thanks for your reply.
I got some more info on this with some debugs, and now have "asterisk" as a Call Name.
The UC500 does have a public IP address. Does it receive and accept SIP calls on this public interface without any config? It's just a Dialer with pppoe.
Regards
08-11-2010 05:13 AM
Yes, it does, "just pppoe" is a perfectly valid public address.
You can also check new features to prevent that:
http://www.cisco.com/en/US/tech/tk652/tk90/technologies_tech_note09186a0080b3e123.shtml
please remember to rate useful posts clicking on the stars below.
08-11-2010 05:30 AM
How can I achieve this with early firmware version? I have 15.0.1XA on a UC520.
Or where can I get 15.1.2 IOS, in the software page I only have 12.4.
Many thanks
08-11-2010 05:34 AM
Enter "toll fraud" in cisco.com search box, and read relevant documents.
08-11-2010 06:19 AM
Sorry to bother again,
Do you know if there's already a 15.1.2T version for the UC520? I'm not able to find it anywhere.
Many thanks
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