Comtech EF Data CDM-570 - Manual (Page 280)

CDM-570/570L Satellite Modem with Optional IP Module Revision 12
Ethernet IP Module - CLI and Telnet Operation MN/CDM570L.IOM
14–10
Selection Entry Description
L3/L4/L5 Rx Header
Compression (continued)
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.
L2 Tx Header
Compression
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.
L2 Rx Header
Compression
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.
Tx Payload Compression 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.
Rx Payload Compression [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..
FAST Feature Code Y If a FAST option is purchased, the FAST Access Code is entered here to
enable that option.
Vipersat Feature Codes Review the Vipersat features enable code that has been provided by Comtech
Vipersat for the modem configured to operate under VMS control.
Vipersat File Streamer Refer to the Vipersat User Manual for complete information.