A table of HE operation entries to instruct Subscriber-units
to move to a new downstream and/or upstream channel.
An entry in this table is an operation that has been
initiated from HE to generates downstream frequency and/or
upstream channel override fields in the RNG-RSP message sent
to a Subscriber-unit. A RNG-RSP message is sent to a
SU during initial maintenance opportunity.
This operation causes the HE to place an entry for the
SU specified into the override request queue. The link is
then broken by deleting the SU from its polling list. When
the SU attempts initial ranging, the override request
causes downstream frequency and upstream channel override
fields to be inserted into the RNG-RSP message.