Hi,

I have a dissector code (atmii) and I am having problem in understanding the 
following two lines of code:

In proto_register_atmii()

aal_dissector_table = register_dissector_table("atmii.aal2_payload", "AAL 
payload type", FT_UINT8, BASE_DEC);

and then in dissect_atmii()

if (!dissector_try_port(aal_dissector_table, payload_type, next_tvb, pinfo, 
tree)) {
proto_tree_add_item(atmii_tree,hf_atmii_aal2_payload, tvb, ATM_HEADER_LENGTH, 
-1, FALSE);
}


What does these two lines of code do in general as I've seen them in other 
protocols as well?

Thanks
Vishnu
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