How can Block a pri channel

["Alireza Shokoienia" <AliShokoei@xxxxxxxxxxxxx>]

Hi all,
I'm new in astersik and like to know how can block a pri channel. It means I want block some channels on a pri link so nobody can
occupy these channels, i.e channels 1 through 5 should be blocked.
What is the Q931 message for blocking a channel? and can I see this message when I want use a protocol analyzer?

thanks in advance
Alireza

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