User's Manual Part 1

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Link Symmetry By default Link Symmetry of a Point-to-Point link is ‘Symmetrical Data Rate
(1:1)’ in this configuration the ratio of time the wireless link spends transmitting and receiving is
equal. When Link Symmetry is configured to Asymmetric Data Rate (2:1) the wireless link
Master will spend twice as long transmitting as receiving. It should be noted that data rate
available to the end users might not follow these ratios exactly. The exact data rates will be
dependant on the prevailing modulation modes.
Target Receive Modulation Mode This is the maximum mode the unit will use as its adaptive
modulation. The modulation modes available are:
• BPSK 1 / 2
• QPSK 1 / 2
• QPSK 2 / 3
• 16QAM 1 / 2
• 16QAM 3 / 4
• 64QAM 2 / 3
• 64QAM 3 / 4
• 64QAM 7 / 8
By default the Target Receive Modulation Mode is 64QAM 7/8.
Maximum Transmit Power This specifies the maximum transmit power in dBm of the system, it
is country dependent and although the user can change this it will be limited to that country’s
regulations.
ARQ State Automatic Repeat reQuest (ARQ) is a mechanism where packets lost due to
transmission errors over the wireless link are retransmitted rapidly. The retransmission helps to
prevent TCP congestion mechanisms from inadvertently interpreting intermittent pack loss as
network congestion. ARQ must be enabled on both end of the Point-to-Point link for it to
function.
Dynamic Frequency Selection (DFS) The user can enable or disable the DFS functionality, by
default it is enabled. Note that this attribute will be greyed out when the installation agent is
armed. Disarming installation will return this attribute to its normal state.
IP Address Internet protocol (IP) address. This address is used by the family of Internet
protocols to uniquely identify this unit on a network.