The zone indicates what function a PT traffic stream is performing at the current time. 


0

No request area available.

1

Hold time has expired, requested range exceeded.

2

Only ADVANCE.

3

Always ADVANCE, if possible, no change on demand possible.

4

ADVANCE if possible, otherwise request. 

5

Only BLOCKING.

6

Always BLOCK if possible, no change on demand possible.

7

BLOCK if possible, otherwise request. 

8

Request