User's Manual
2. Preliminary Decisions
AMPS EAC-2100 Manual: (Draft, 02/01) Page 2-14
2.5.2 Selecting a Boosted DCCH Channel
The boosted DCCH channel (Selection 1-4, RF boards menu) is the control channel that will be
used in the EAC-2100 coverage area. Select a channel that meets the following requirements:
• Must conform to the DCCH channel plan for the system with which it is to work:
• Must be included in the neighbor list of its donor cell site and any neighbor cells that may
be in range of the EAC-2100
o The boosted DCCH channel may be entered into the switch either as a
phantom cell or as a border cell.
o A DCCH channel that is assigned to a cell site elsewhere in the system should
not be “borrowed” as a boosted DCCH channel for the EAC-2100 unless the
system has the ability to segregate operational areas. Otherwise, subscribers
operating through the EAC-2100 may be viewed by the system as a potential
hand-off candidate to the cell from which the DCCH assignment was
“borrowed”, even if the subscriber is many miles away from that cell.
• Must be different from the DCCH and DTC RF channels used in cells adjacent to the EAC-
2100 to avoid interference.
2.5.3 The Revertive DCCH Channel Option
When the Revertive DCCH Channel Option (selection E, DCCH Channels Menu) is enabled,
the EAC-2100 continues to repeat the DCCH channel (forward and reverse) when all of the
normal DTC channels become occupied. If another call goes through, the DCCH channel
equipment is redesignated to operate as DTC only, and the last candidate is assigned to and
boosted by the DCCH channel equipment. If the DCCH channel has a DTC call up on either or
both of its available DTC channels, then the revertive operation will be inhibited. Only when no
DTC channels are being boosted on the DCCH channel will the EAC-2100 temporarily reassign
the DCCH channel for DTC-only service.
When the call on the temporarily reassigned DCCH channel ends, the equipment reverts to
repeating the DCCH channel. If another DTC RF channel becomes free (no calls on any of its
time slots), then the EAC-2100 will hand-off the subscriber(s) operating on the DCCH channel
equipment to the newly available DTC RF channel equipment (this is referred to as call
transfer). The DCCH channel equipment then reverts to repeating the DCCH channel.
F There must be at least a 3-channel spacing between any boosted
channel and any donor channel.