Icom ICRS-MMDS-I, User Manual

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Bandwidth:

Set the transmit signal bandwidth of RADIO. The default is “20MHz”. 

VQoS/TDM:  

Enable VQoS/TDM to allow Base Station to use the technology of Time Division 

Multiplexing by assigning each data stream for CPE a equal time slot per cycle. The default setting is 
“Disable”

.

Antenna:

 For this model, the default is 

“Fixed on Primary” 

Regatta Mode:

 Choose “Enable” for anti-interference, it may be make better the performance of 

throughput. The default setting is “Disable”

.

Advanced Parameter

s 

These parameters can be changed if needed, but the default advanced setting usually work 
well. It is recommended that you keep all these values in factory default. 

CPE Download Speed: 

This function provides flow control with a multiple of 64kbps for 

CPE . The setting range is 1-1687.

RTS Threshold: 

RTS Threshold is a mechanism implemented to prevent the “Hidden Node” 

problem. If you have more collisions, it is recommended to enable RTS. If you have fewer 
collisions, it is not necessary to enable RTS. Forcing the wireless bridge to implement the 
RTS/CTS handshake will significantly increase the overhead and reduce throughput. If the 
size of the packet transmitted is larger than the value you set, the RTS should be enabled. The 
setting range is 0-2346. 

Fragmentation Length:

 Fragmentation mechanism is used for improving the efficiency 

when there is high traffic within the wireless network. If you transmit large files in a wireless 
network, you can enable the Fragmentation Threshold and specify the packet size. This 
specifies the maximum size a data packet will be before splitting and creating a new packet. 
The setting range is 256-2346. For example: If you set value as 256, it means the packet will 
be fragmented into “256” bytes while transmitting.   

Bacon Interval:

 This value indicates the frequency interval of the beacon.    A beacon is a 

packet broadcast by the Base Station to keep the network synchronized. A beacon includes the 
wireless network service area, the Base Station address, the Broadcast destination addresses, a 
time stamp, Delivery Traffic Indicator Maps, and the Traffic Indicator Message (TIM). The 
setting range is 4-1000.

Space In Meter: 

This space in meter is used for extending ACK time-out destination. The 

setting range is 0-100000. It would be better set this parameter per the 

actual distance

. For 

PTMP connection, the parameter of the Center point or Base Station would be the distance 
between the Center and the farthest remote site. 

TDM Time Slice Value: 

The setting range is 2-32 ms.   

The minimum value is 20 ms for Channel bandwidth 5MHz, 10ms for Channel bandwidth 
10MHz and 5 ms for Channel bandwidth 20MHz. 

SoftwareRetry: 

The setting range is 0-15 ms. 

HardwareRetry: 

The setting range is 1-15 ms.