What is the "DLR Queue" ?

[Mickael - System Administrator (WebD Services)]

hello,

What is the DLR Queue?
Do they have not been forwarded to the dlr-url or kannel is awaiting 
receipt (from operator) ?

        <dlr>
                <queued>386</queued>
                <storage>internal</storage>
        </dlr>


...

        <smsc>

                <name>SMPP......</name>
                <id>1</id>
                <status>online 16079s</status>
                <received>1336</received>
                <sent>1722</sent>
                <failed>0</failed>

                <queued>0</queued>
        </smsc>

Mickael.