Base Station; Channel Configurations (Full/Half Duplex); Full-Duplex - Futurecom PDR8000 Manual

Document 8K088X02 R5.0
PDR8000® Portable Digital Repeater Product Planner
The ability of a PDR8000 to repeat P25 Packet Data is controlled by a separate configuration
parameter (Repeat Packet Data). This allows the PDR8000 to be enabled/disabled for Packet
Data Repeat separately from the mode controlling repeat of Voice and Supplementary Data.
This single configuration parameter for P25 Packet Data applies across all channels of a
Deployment Profile in the PDR8000.
5.2.2 B S
ASE TATION
In the Base Station mode of operation, the primary function of a PDR8000 is to relay
information between the wireline interface connection and the RF. In this case, the PDR8000 is
acting as the RF MODEM between the system infrastructure and the RF carriers. Base Station
mode is compatible with P25 channels when using V.24 wireline interface. However, when
using Ethernet wireline interface, the Base Station mode is configurable for Analog, P25 or mix-
mode channels. The channels may be configured as simplex, half-duplex or full-duplex. In the
case of a full-duplex channel, the PDR8000 can simultaneous send information from wireline
interface to RF, and from RF to wireline interface. In the case of a simplex or half-duplex
channel, the PDR8000 only allows information transfer in one direction at a time; if activity is
being received by the PDR8000 on both the RF and wireline link, then the information allowed
to progress is dependent on a (PTT Priority) configuration parameter as described in 6.2.7. See
Base Station illustrative examples in 5.4.1 and 5.4.2.
It is assumed that in a Base Station configuration, any required Repeat functionality is provided
by an external entity connected to the PDR8000 (e.g. comparator or console). In Base Station
mode, the PDR8000 administrator cannot enable Local Repeat options, and a console cannot
control Repeat operation via wireline commands.
In system configurations that depend on Repeat functionality being provided by an external
entity (e.g. comparator or console), it is often desired to utilize a backup mode in the PDR8000
to provide Repeat functionality should the external repeating entity fail, thus allowing subscriber
units to continue communicating with each other through a backup repeat mechanism. For this
situation, PDR8000 supports Fallback In-Cabinet Repeat functionality. This is configurable
behavior that allows a PDR8000 to provide its own Repeat functionality during the time that the
comparator/console is not reachable or not functional (see 6.5).
5.3 C C (F /H D )
HANNEL ONFIGURATIONS ULL ALF UPLEX
The V.24 wireline interface to PDR8000 is a full-duplex link, able to send and receive
information at the same time. However, there are different configurations for the RF aspect of a
PDR8000 that govern whether the PDR8000 can both Transmit and Receive on the RF channel
at the same time (full-duplex), or whether only one side of the RF channel is serviced at once
(half-duplex). This (Full/Half) Duplex mode is configurable on a per-channel basis.
Analog and Mixed-mode channels are supported for full-duplex operation only.
5.3.1 F -D
ULL UPLEX
A channel configured for Full-Duplex operation provides simultaneous operation of the
PDR8000's Transmit and Receive functionality on the RF channel. In the case of a full-duplex
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