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Page 86 of 302
IP Network engineering guidelines
Select subnet configuration
Separate subnet configuration
553-3001-204 Preliminary 0.10 August 2000
OM Report description
The OM log file is a comma-separated (.csv) file stored on the MAT 6.6/OTM
1.0 PC. Using MAT/OTM you can run an adhoc report or schedule a regular
report. A new file is created for each month of the year in which OM data is
collected. It can be read directly or imported to Microsoft Excel for
post-processing and report generation. Collect these OM reports and store
them for analysis. At the end of each month, identify the hours with the
highest packet lost/late statistics and standard deviation statistics generated.
Compare the data to target network QOS objectives.
Declines in QOS can be observed through the comparison of QOS between
last period and current period. A consistent inferior measurement of QOS
compared with the objective should trigger an alarm to the customer that the
customer must take steps to strengthen the performance of the route.
The card creates a new log file each day. Files are automatically deleted after
seven days.
A subnet is defined as a remote network serving a collection of i2004 Internet
Telephones, which is represented by a Server or Router communicating with
the ITG processor for VoIP service. (See Figure 11 on page 67.)
Each ITG card has two Ethernet ports, one for the Telephony LAN (T-LAN)
and one for the Embedded LAN (E-LAN). The advantages of this
configuration are:
•
optimization of Vo IP performance on the Telephony LAN segment by
segregating it from E-LAN traffic and connecting the T-LAN as close as
possible to the WAN router.
•
making the amount of traffic on the T-LAN more predictable for QOS
engineering.
•
optimization of E-LAN performance. For example, for Symposium Call
Center Server (SCCS) and Call Pilot functional signaling, segregating
the E-LAN from ITG T-LAN VoIP traffic.
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