User's Manual
5. Installing the Remote Link
EAC-2100 Manual: (Draft, 02/01) Page 6-3
Note that the RSSI that the portable subscriber would experience from the EAC is
computed from the average RSSI at the EAC from the portable and the PA power
settings.
Once the signal conditions are met, the EAC will attempt a hand-in by using an
available RF Module to send a handoff message to the subscriber. If the signal level at
the subscriber is at least 3 dB better from the EAC, it will take the handoff message and
move to the EAC-2100 DTC channel, and the EAC-2100 will handle the call.
If an idle RF Module is not available for the hand-in process, the EAC-2100 will switch
to its “idle-time-slot and hand-in” mode. In this case, the hand-in will performed by the
RF Module that is monitoring the hand-in candidate and already has a call up on one of
its other time-slot pairs.
6.5 Entering the Donor DTC channels
From the description of the hand-in process, it is clear that the EAC-2100 must know
the possible channels that portables might be using when communicating with the
donor. To enter the donor channels, use the SET command to navigate to the Voice
Channels menu and choose a list not already in use. For example, DONOR VOICE
CHANNELS LIST 1 might have been used to enter the donor analog voice channels.
Enter the donor DTC channels into the list, and use the menu options to set the channel
Type to TDMA, then set the DVCC to the DVCC of the donor.
Note: If the donor does not use a single DVCC on all the channels, use the
“ANY” setting for the DVCC of the list.
Note that this list of donor channels is only required for hand-in operation. For calls
that originate or answer while in the EAC coverage area (i.e. calls that are processed
through the EAC DCCH), the donor channel information is extracted from the channel
assignment message.
6.6 Example Handin and handback threshold settings
Following are some useful combinations of hand-in and handback threshold settings,
and a description of the expected functionality that would occur.
Default settings:
HANDIN LOAD SHED LEVEL -100 dBm
HANDIN MINIMUM IMPROVEMENT 5 dB
HANDBACK LOAD SHED LEVEL –90 dB
HANDBACK MINIMUM IMPROVEMENT 2 dB