Dynamic interval

[xtrimf]

Hello,

I have the following table:

Phone1	Phone2	Call direction	date	time
123	789	OUT	01/01/2012	10:00
123	456	OUT	01/01/2012	10:05
123	456	OUT	01/01/2012	10:45
123	456	IN	01/01/2012	10:30
123	456	IN	01/01/2012	10:50
123	789	IN	01/01/2012	10:22
123	789	IN	01/01/2012	10:55
123	456	OUT	01/01/2012	11:30
123	789	OUT	01/01/2012	11:00

and I have also a dynamic variable:

I need to create a report that shows all the call that took place within 20 minutes (or any other value from the slyder) between any couple Phone1-Phone2.

For example in this case and a 20 minute interval it will show:

Phone1	Phone2	Call direction	date	time
123	456	IN	01/01/2012	10:30
123	456	OUT	01/01/2012	10:45
123	456	IN	01/01/2012	10:50

is it possible?

tnx

[xtrimf]

anyone??