Calling Search Space Best Practice?

Answered Question
Jul 7th, 2008

Hello All,

I am in the process of setting a corporate standard for how phones are configured in our CallManager server. We are currently running 4.2(3) but are looking towards 6.1 in the future.

Part of this process is laying out the best way to configure a phone for ease of administration, security, and functionality. There is one place I've gotten stuck and that's the phone Calling Search Space (CSS). I have read both a Cisco IP Telephony and CallManager Best Practices book and done many searches and I seem to get conflicting information.

We are currently setup in a centralized model and only allow inter-site dialing through access codes. According to the Best Practices book, we are currently using one of the worst approaches for number of partitions and css's but the best practice approach doesn't really work because of the need to keep the phones isolated.

From what I can tell, the best option would be to create 5 main partitions and any others that are required by site. (Phones, Emergency, Local, Local and Long Distance, and International.) I would then create matching CSS's for security. (Internal, Local, Local & Long, International.) I have that developed so far but how do I actually use those correctly on the phones? I was under the assumption that the phone used the Line CSS for Call Forward settings if they were not defined but I found that isn't the case moving forward. With that in mind, the proper CSS's should be defined for Call Forward settings as well.

Now, we are at the phone configuration phase, there are two places to define the CSS, the device and the line. From what I've read, there really isn't a need to use the two concatenated together. Would it be better to use the Device level and leave the line at none or set the device to none and use the line level?

Thanks!

Eric

I have this problem too.
0 votes
Correct Answer by Jaime Valencia about 8 years 5 months ago

have you gone thru the SRND?

That topic is throughly covered there:

Calling Privileges in Cisco Unified CallManager

http://www.cisco.com/en/US/partner/docs/voice_ip_comm/cucm/srnd/4x/42dialpl.html#wp1043737

Building Classes of Service for Cisco Unified CallManager

http://www.cisco.com/en/US/partner/docs/voice_ip_comm/cucm/srnd/4x/42dialpl.html#wp1044899

Classes of Service with the Line/Device Approach

http://www.cisco.com/en/US/partner/docs/voice_ip_comm/cucm/srnd/4x/42dialpl.html#wp1044961

HTH

javalenc

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Correct Answer
Jaime Valencia Mon, 07/07/2008 - 14:39

have you gone thru the SRND?

That topic is throughly covered there:

Calling Privileges in Cisco Unified CallManager

http://www.cisco.com/en/US/partner/docs/voice_ip_comm/cucm/srnd/4x/42dialpl.html#wp1043737

Building Classes of Service for Cisco Unified CallManager

http://www.cisco.com/en/US/partner/docs/voice_ip_comm/cucm/srnd/4x/42dialpl.html#wp1044899

Classes of Service with the Line/Device Approach

http://www.cisco.com/en/US/partner/docs/voice_ip_comm/cucm/srnd/4x/42dialpl.html#wp1044961

HTH

javalenc

if this helps, please rate

ecornwell Tue, 07/08/2008 - 12:34

Thank you, that was exactly what I was looking for!

As a side note, I had to change the links to get them to work. partner->customer.

Thanks!

Eric

Jaime Valencia Tue, 07/08/2008 - 17:05

oh sorry, it just that since i'm always logged in to CCO sometimes i forget to take the partner/ from the link. good thing u knew exactly what to do to get the info. glad the info was useful for u

javalenc

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