CDR is NOT friendly in the Nortel system. You can turn it on or you can turn it off. That's about it. It will give you information on all calls in a very raw format.
From there you will need to wire up a TTY port so you can collect this information to a seperate application, or you can parse the information out to a spreadsheet. There are some on the NET if you look.
If you have a lot of call traffic, the capture file you collect in one day could be a 5-6 MB file. That doesn't seem like much these days, but when was the last time you tried to open a 5MB text file. It will lock up your computer.
CDR is not just punch in a few line code changes and you have what you need. It doesn't store historical data without a buffer box and you telling it to do so.
Still if you want to turn this on.....
In LD 15 you need to make a change to the CDR_Data
Req: chg
Type: CDR
CDR: YES
PORT: whatever tty port will collect the data
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LD 16 - you need to turn on CDR on each incoming and outgoing route you want to track. check your ntps to make sure you collect what you want.
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LD 17
Add CTY to the USER prompt on the TTY you are using to collect CDR information
Be careful what you promise someone when it comes to CDR. CDR applications can be very expensive, and if you use a macro enabled spreadsheet, it can be very time consuming for you to keep up with it.
Hope all this helps.