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9-38 System Cards
Model No.
Running Head
WAN Card User Screens and Settings WAN Card
9.4.4 Performance Data
All WAN cards gather performance data. The performance data for a T1 or E1 line is viewed
by typing “p” in the WAN Card Main Screen, to invoke the Perf command. Performance data
is accumulated for 15-minute increments that include the current period and the previous 96
periods (24 hours), which are accessed via the pgUp and pgDn commands of the Main Screen.
In the T1 environment, an error is defined as any CRC-6, Controlled Slip, or Out of Frame
(OOF) error for ESF framing, and any Bipolar Violation (BPV), Controlled Slip, or OOF error
for the D4 format. In an E1 environment, an error is defined as any CRC-4 error, Controlled
Slip, or OOF error.
Figure 9-22 shows a typical T1 Performance Data Screen. The E1 screen is similar except for
the actions on its bottom line, where uSerregs and Networkregs commands are not provided.
The performance statistics are gathered and displayed in 15-minute intervals. Lines in each of
the columns represent periods when no seconds have accumulated.
In the AT&T mode, two sets of registers accumulate performance data for T1 WAN links. The
user registers and network registers are driven by the same errored events. However, they can
be cleared separately. You can view both the user and network registers, but you can only clear
the user registers. The network only has access to the network registers, and can only clear
those registers. The ANSI and E1 WAN links have only one set of registers.
Figure 9-22.Typical Performance Data Screen