Mocomtech CDM-570L Manuel D’Utilisation

CDM-570/570L Satellite Modem with Optional IP Module 

Revision 4 

IP Module Ethernet Interface Overview 

MN/CDM570L.IOM 

ADLC 1472 

Calgary 

1.76 

ADLC 1000 

Calgary 

1.76 

ADLC 500 

Calgary 

1.77 

ADLC 100 

Calgary 

2.09 

ADLC 1472 

Canterbury

1.71 

ADLC 1000 

Canterbury

1.72 

ADLC 500 

Canterbury

1.74 

ADLC 100 

Canterbury

2.04 

LZS 1472 

Calgary 

1.66 

LZS 1000 

Calgary 

1.66 

LZS 500 

Calgary 

1.68 

LZS 100 

Calgary 

1.97 

LZS 1472 

Canterbury

1.61 

LZS 1000 

Canterbury

1.62 

LZS 500 

Canterbury

1.63 

LZS 100 

Canterbury

1.91 

Quality of Service (QoS) is an optional feature of the IP Module. The user may select one 
of three modes of QoS operation: 
 
•  Mode 1 – QoS Rules based on Maximum Bandwidth and Priority 

•  Mode 2 – QoS Rules based on Minimum and Maximum Bandwidth 

•  Mode 3 – DiffServ 
 
QoS Segmentation and Reassembly (SAR) - Packet Segmentation and Reassembly 
(SAR) is enabled automatically while QoS is enabled. However, SAR is an adaptive 
process; it will trigger only if the packet latency exceeds the threshold value (default to 
20 msec). Latency value is calculated based on the satellite transmission bandwidth. 
There is no minimum segment size.  However if the last segment is less than 16 bytes, 
then it will be appended to the previous segment excluding satellite HDLC header in 
order to avoid satellite overhead and consumption of CPU cycles. 
 

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