3241 GW ISDN to CUCM calls must be block
Hi Experts
I need your suggestion below
One of our customer with cisco Telepresence infrastructure setup (VCSC & E, conductor, TIP Server & TMS, CUCM). CUCM and integrated VCS, we recently installed ISDN the Gulf war (3241)
Now the client wants to block incoming and outgoing calls of CUCM to ISDN GW extension of GW ISDN extension CUCM
CUCM numbering plan is 62XXXX series and of VCS E.164 dial Plan is 64XXXX. All products in the most recent version S/W
someone suggest how fulfill us this requirement
Concerning
SR
Hello, welcome to the Cisco support community! =)
There are two methods to meet your need, first using the rules of research named source areas and the second is the script of CPL. I'll give you an example on the use of the rules of research, which is the easiest way to meet your need:
Blocking of the ISDN to CUCM
1) register your gateway ISDN to a subarea separated in VCS control, for example 'ISDN-sub-zone '. Only the entry door must to enter this sub-area.
2) create a search rule that fits your plan number CUCM, in your case, 62XXXX. This rule have priority over any other rules of game. Set the 'source' as the 'ISDN-sub-zone ". Use the parameter "replace" and transform the number to an unknown number. Set the 'match' 'Stop '. If your ISDN gateway will not be able to call any CUCM endpoints.
Blocking of CUCM to ISDN
1) the easiest is to make blocking calls using CUCM himself. You can use the CSS/Partition of CUCM features in order to refuse some end points to call ISDN numbers
2) , but you can also use the VCS to block calls. You can use the same logic above. Create a search rule that fits your plan ISDN number, in my case, 0\d. * This rule have priority over any other rules of game. Set the 'source' as being the nearby area of CUCM. Use the parameter "replace" and transform the number to an unknown number. Set the 'match' 'Stop '. End points so that all your CUCM will not be able to call all ISDN numbers. Be aware that it will be applied to all the endpoints registered to CUCM, if you want to block only the end points, use the Partition/CSS of CUCM functions.
Free fraud prevention
When you implement an ISDN gateway registered in VCS, especially when you have a highway of VCS, you should consider the need to implement a free fraud prevention mechanism which will prevent external users to use your system as a phone system without. For example, if you do not implement such a mechanism, external Internet allows your VCS Expressway users to achieve your ISDN gateway and then free ISDN calls using your gateway. In addition, there is another method of fraud called "reunification", where the user external dials to your ISDN via ISDN gateway and connect to the auto attendant to recognition of the bridge, if it is enabled, then the user redial another ISDN number and then the call is routed to ISDN using your entry door, in other words, a malicious user can make a local call to your gateway and then use your gateway to recompose and make an international call, for example.
Therefore, it is extremely important to look at a diagram of toll-free fraud prevention when implementing any ISDN gateway registered in VCS, especially when you have VCSE.
Fortunately, Cisco provided a configuration example explaining how to block two methods of fraud without charge. Take a look at this guide from page 40:
I suggest you consider all of the above examples, save time to plan and then implement your restriction and ISDN toll-free fraud prevention mechanism.
I hope this helps.
Paulo Souza
My answer was helpful? Please note the useful answers and do not forget to mark questions resolved as "responded."
Tags: Cisco Support
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In my implementation we hane one ISDN gw with 1 E1 (several DID). several points of video endpoints (VEP) will use this ISDN gw.
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Normally I restrict access to the ISDN gateway by only search rules. Try this:
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- Let's say that your ISDN gateway is to register the prefix 9 for VCS, so that when you dial 9XXXX the call is routed to the ISDN gateway that is registered in the local area of VCS
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Please, follow all the instructions, I mentioned above, it is so important.
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