Comtech EF Data CDM-570 Installation And Operation Manual page 280

CDM-570/570L Satellite Modem with Optional IP Module
Ethernet IP Module - CLI and Telnet Operation
Selection
L3/L4/L5 Rx Header
Compression (continued)
L2 Tx Header
Compression
L2 Rx Header
Compression
Tx Payload Compression
Rx Payload Compression
FAST Feature Code
Vipersat Feature Codes
Vipersat File Streamer
Entry Description
For example:
Step1. Enable remote modem TX Header Comp (data link will be lost).
Step 2. Enable local modem RX Header Compression (data link will be
restored).
Step 3. Enable remote modem RX Header Comp (data link will be lost).
Step 4. Enable local modem TX Header Compression (data link will be
restored).
Important Note for Streamline Encapsulation users (IP Module V1
Firmware Ver. 1.7.# and later / IP Module V2 Firmware Ver. 2.2.# and
later):The modem will detect if packets received were Header Compressed
on a packet by packet basis. Therefore there is no need to enable or disable
L3/L4/L5 RX Header Compression and this is a read-only selection as either
Available or Unavailable.
L Compresses L2 headers when set to Enabled and only applies in Managed
Switch Mode.
Important Note for Streamline Encapsulation users (IP Module V1
Firmware Ver. 1.7.# and later / IP Module V2 Firmware Ver. 2.2.# and
later):This option is only displayed when in Managed Switch Mode.
J Decompresses L2 headers when set to Enabled and only applies in Managed
Switch Mode.
Important Note for Streamline Encapsulation users (IP Module V1
Firmware Ver. 1.7.# and later / IP Module V2 Firmware Ver. 2.2.# and
later):This option is not displayed when in Managed Switch Mode. The
modem will detect if packets received were L2 Header Compressed on a
packet by packet basis.
C Allows a stream of traffic to be payload compressed. Payload is considered
everything inside the HDLC satellite frame. Therefore, IP headers could be
compressed as well. Note that in Managed Switch Mode, the option is
Enabled or Disabled for all traffic. In Router mode, Payload compression will
show Available, and one must set the option Per Route in Routing table.
[RO] Displays feature status. This option is always [Available] if purchased. Rx
Payload Compression allows a unit receiving a stream of data that has been
payload compressed to be correctly uncompressed. This option is auto-
sensed by a bit carried in packet headers..
Y If a FAST option is purchased, the FAST Access Code is entered here to
enable that option.
Review the Vipersat features enable code that has been provided by Comtech
Vipersat for the modem configured to operate under VMS control.
Refer to the Vipersat User Manual for complete information.
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Revision 12
MN/CDM570L.IOM