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Integrated Network Management Broadband Release 4.1 Engineering Considerations
X Terminals Engineering Capacities
X-Terminals are graphical terminals with a local processor and software to run
the X Window System. The X-terminal platform of choice for INM Broadband
Release 4.1 is:
•
Other X-terminal platforms which are supported (with 16 Mb of RAM):
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•
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The INM Broadband background map feature introduced in the S/DMS
Network Manager Release 5.0 which provided the capability to display GIF
and DXF files in network and subnetwork windows, placed a unique
engineering strain on the X terminal. These engineering capacities still apply
in Release 4.1 of the INM Broadband.
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INM Bandwidth Consumption
The following table provides the recommended WAN bandwidth requirements
from the INM site to the Controllers. The worst case bandwidth requirements
occur for User Interface screen updates for a maximum number of 60 remote
logins (achievable on the HPC110 platform with 10 users at 6 login sessions
per user) and that every screen is fully updated when an event occurs. The
bandwidth specified should permit the transmission of all alarm data to all
INM users within approximately 10 seconds (or less) of an alarm condition
being detected. This 10 second figure does not take into account any delays
imposed by the Controllers in reporting the alarms to the INM workstation.
Integrated Network Management Broadband Release 4.1
HP Entria II color X-terminal with 16 Mb of RAM
HP Envizex color X-terminal
Tektronix XP18 color X-terminal
NCD19R color X-terminal
The worse case memory consumption for displaying a single GIF map is
1.3 Mb, based on a map which covers the entire display and uses all 256
colors. Based on the worse case scenario, memory upgrade may be
required on all X terminals when many detailed GIF maps in multiple
subnetwork windows are required.
DXF images will not exhaust X terminal memory, but require sufficient
bandwidth between the INM Broadband and the X terminal for the
redrawing operations to be efficient. It is recommended that DXF maps be
used only where there is 10 Mb/s ethernet connectivity.
PG OC 98-13
Issue 1.2
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