Alcatel Carrier Internetworking Solutions Switch/Router ユーザーズマニュアル

Page 33-17

There are a number of commands available for viewing local 

T1

 and 

E1

 statistics. These 

commands provide statistics for the past 24 hours, the current 15-minute interval, or the past 
96 15-minute intervals. The following sections describe these commands.

You can view statistics occurring during the past 24 hours on a single port by entering the 
following command

where 

 is the slot number where the board is located, and 

 is the port number on 

the board for which you want to view statistics. For example, to view 24-hour statistics for 
Port 2 on the board in slot 5, enter

A screen similar to the following displays:

 

 The textual description of this 

T1

 or 

E1

 port as configured through the 

 

command.

. Indicates the number of 15-minute intervals for which valid statistics were gath-

ered during the previous 24 hours. Statistics may be gathered for up to 96 15-minute intervals 
during a 24 hour period.

. The number of seconds that have elapsed during this 15-minute interval of gath-

ering statistics. This time will be reset to zero when a 15-minute session of statistics gathering 
is complete (and stored) and the next 15-minute interval begins.

. Errored Seconds. For T1-

ESF

 and 

E1-CRC

 conditions, this is a second with one or more 

Path Code Violations, one or more out-of-frame defects, one or more controlled slip errors, or 
an 

AIS

 error.

. Severely Errored Seconds. For T1-

ESF

 frames, this is a second with 320 or more Path 

Code Violation errors, one or more out-of-frame defects, or an 

AIS

 error. For 

E1-CRC

 condi-

tions, this is a second with 832 or more Path Code Violation errors, or one or more out-of-
frame defects. For 

E1

-no

CRC

 signals, this is a second with 2048 or more Line Code Violation 

errors. For 

D4/(SF)

 frames, this is a second with framing errors, an out-of-frame error, or a 

second with 

1544

 or more line code violation errors.

. Bursty Errored Seconds. The number of seconds with fewer than 320 but more than one 

(1) Path Code Violation error (see below for definition), no Severely Errored Frame errors, 
and no 

AIS

 errors.

. Unavailable Seconds. The number of seconds this port was unavailable for transmitting 

or receiving data. In general, a port is unavailable after 10 consecutive Severely Errored 
Seconds or after a failure on the interface occurs.