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Ethernet Layer
The data link layer is Ethernet according to IEEE 802.3/802.3u (auto sensing 10/100 Mbps, Twisted Pair, RJ-45 connector).
IP Overhead
The IP overhead calculation when mapping MPEG-2 TS packets into IP frames is shown in the following table.
Total overhead factor becomes: 1.006 x 1.015 x 1.010 = 1.031 or 3.1% overhead.
NOTE…
The number of MPEG-2 TS packets one can map down into each UDP frame is variable (between 1 and 7). Usually 7 is
used for minimum overhead. This is also used in the above calculation.
Alarm Lists
Base Unit
HD H.264 VCM
SD MPEG-2 VCM
Base Chassis Alarms
The following table lists the alarm and failure identifiers generated within the Host Controller of the chassis.
Overhead factor
Comments
MPEG-2 TS
1.0
UDP
1324/1316 = 1.006
UDP header=8 bytes
IP
1344/1324 = 1.015
IP header=20 bytes
Ethernet
1358/1344 = 1.010
Eth header=14 bytes
Name
Module
Slot
Port
ID (hex)
ID (dec)
Type
Description
Fan Failure
Base Unit
Host
0
00000441
1089
internal
Permanent
damage may
be caused by
running the
chassis whilst
the fans are
not working.
Over Temperature Warning
Base Unit
Host
0
00000442
1090
internal
Failure to
take action
may cause
permanent
damage to
the chassis.
Please check
the fans are
working
© Ericsson AB 2011. All rights reserved
© Ericsson AB 2011. All rights reserved
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9/11/2012
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