Request a notification be sent to the processing thread.
>>-LISTEN--EVENT(data-value)--NOTIFICATION(data-ref)------------> >--+-----------------------+--+-------------------+-------------> +-FILTER(cpsm-token)----+ '-TOKEN(data-value)-' '-NOTFILTER(cpsm-token)-' >--+---------------------+--THREAD(cpsm-token)------------------> '-CONTEXT(data-value)-' >--RESPONSE(data-ref)--REASON(data-ref)------------------------><