This is not so diffcult. There two tyoes of dial rules
1. Application dial rules
2. Directory lookup rules
Application dial rule is used to map a dialled number to a valid Pattern within your cluster..
E.G you are using private dial plan as your DNs i.e users have 8 digit extension. However in your AD, you have full e164 number populated. When jabber populates user details it will populate the full e164 number. Without some form of digit manipualtion when you try to call that user, the call will fail because the dialled number is not valid...hence the need for an application dial rule...
Example user bbankks has extension 5000800 on his phone. His AD phone field has +23415000800.
To be able to call this user from Jabber you will then configure the ff application dial rules
Number begins with +
Number of digits 12
Total digits to be removed 5
So tis rule will remove the left most first 5 digits..and you will have 5000800 as the dialled number.
You can also use translation patterns to achieve this instead of dial rules...
The directory lookup rules help you to match called numbers to valid E164 numberrs in AD, otherwise when calls come to jabber users the correct CLI will not be displayed...
eg if a user dials 5000800 you need to esxpand it to +23415000800
so you will add a rule like
Number begins with 5
Number of digits 7
total digts to be removed 0
prefix with pattern +2341
NB: Evrytime you make a chane to the dial rule you have to re-apply the cop file. This is why xlation pattern work better and are less intrusive
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