Comtech EF Data CDM-625 - Manual (Page 231)

CDM-625 Advanced Satellite Modem Revision 15
Ethernet-based Remote Product Management MN-CDM625
6–39
6.5.4.3.5 Configuration | WAN Pages
The nested QoS, Compression, and Encryption pages are accessible only to the
Adminstrator when the optional IP Packet Processor card is installed and enabled.
See Sect. 6.5.3.1 for complete details about using conditional access pages.
Click the QoS, Compression, or Encryption tab to continue.
6.5.4.3.5.1 Configuration | WAN | QoS Pages
The ‘Configuration | WAN | QoS’ page is viewable only when QoS is enabled for operation.
With QoS disabled, if the nested QoS tab is selected, in place of a ‘populated’ page the following
message appears:
With QoS enabled, the appearance of this page depends on the active mode of operation. The
active mode is labeled in the upper left-hand page corners, below the nested QoS tab:
• Max/Priority Mode or Min/Max Mode (see Figure 6-21)
• DiffServ Mode (see Figure 6-22)
The label for each page is appended with the following message:
Note that IP is a hyperlink providing direct navigation to this configuration page.
Segmentation and Reassembly (SAR)
This section is identical for the “Max/Priority,” “Min/Max,” and “DiffServ” pages.
Packet Segmentation and Reassembly (SAR) is an adaptive process; it will trigger only if the
packet latency exceeds the threshold value (default to 25 msec). SAR is needed, when running
small-speed (<700 kbps) links, to keep latency and jitter within specifications (25 msec
latency/10 msec jitter) when the lower priority queue contains large packets.
Use the drop-down list to select SAR as Disable or Enable, and then click [Submit].