What your saying is line 1 is in pool, its assigned to the phone as line 1.
Whne you dial 9 to access line 1 you can dial out.
But if you press line 1 you cannot dial out.
Correct?

You mention phones use filter 2 and lines use filter 3....thats means nothing!!!
Filters can be edited so you need to look at those filters as you did not mention what those fiters are restricting.

As a test create filter 05 and no restrictions
Add 06 filter and restrict 900

Go to Filters/Lines and make sure they use filter 05
Then go to Filter/Sets under your test DN and make sure it uses 06.

Try dialling and see what happens?

As a note if it says "Call Restricted" on the display then I guarantee it lies within restiction filters be it applied to line or sets.

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