Comtech EF Data SLM-5650A Vipersat - Manual (Page 60)

Vipersat Configuration
3-20 Vipersat SLM-5650A User Guide
one spin of the STDMA cycle by each of the Remotes belonging to that group.
This is the amount of time that the Remote is provided to send data in the cycle.
Depending on the Hub type that is defined for the modem, the appearance of
this parameter will vary:
• Fixed – Slot Data Length
• Dynamic Slot – Nominal Data Length, Minimum Data Length
• Dynamic Cycle – Maximum Data Length, Minimum Data Length
• Entry Channel – Slot Data Length, Minimum Data Length
• GIR – Minimum Data Length
On a Hub unit, enter the specified value(s) in milliseconds within the allowed
range, as shown in figure 3-20.
Note: When setting the Minimum Data Length, ensure that the slot length is not
less than the maximum MTU (1500 bytes), as this would prevent large
data packets from transmitting and result in the loss of data.
Figure 3-20 Slot Data Length (Dynamic Cycle)
Burstmap Multicast IP
This parameter is used to define the IP address for the Burstmap Multicast that
is sent out by the STDMA burst controller at the Hub to all of the associated
Remotes in that group. This address must be the same for all members of the
group. The burst map is a proprietary message sent from the Hub to all
Remotes, at regular intervals, specifying the relative start time and duration for
each terminal to transmit.
To set this parameter, enter the specified Multicast IP address (figure 3-21),
then click the Submit button.
Figure 3-21 Burstmap Multicast IP field
NOTE