Configuring Services with more than one level

[Joe]

I do not speak much English I apologize but what I mean is:

I have a problem with the configuration to create services in OTRS.

I need to create:

3 levels of service.

I need three fields, one for each level and that as you select a higher level, just bring up the options for its second level and the third level respectively, but the template only provides a level of services which if I take all the catalog as I have plan to implement, would be so long that users will not have the patience to read the whole thing to select the correct

The solution is to code level anyone can help me?

I need to enter a newticketphone
The version I use is OTRS 3.2
The base that I have is SQL 2008