Administering E1 and T1 Services
Using Net/E1 and Net/T1 status windows
MAX Administration Guide
5-11
The following display shows the contents of the FDL2 Stats window:
10-500 FDL2 Stats
>Error Events...
Current Period...
Last 24 Hours...
00:00... v
Note:
Pressing the Down Arrow key displays additional statistics.
Display the statistics accumulated during the current 15-minute period (Current Period), the
summed performance data accumulated during the past 24 hours, or the statistics for any
15-minute period in the previous 24 hours. If you select Last 24 Hours, get any past period’s
registers, select an hour from the window, (03:00, for example), and then select any 15-minute
period within that hour. Select any hour within the last 24.
Note:
If your T1 service has a D4 (SF) interface, no carrier performance data is recorded. The
D4 format consists of 12 consecutive frames, each one separated by framing bits. T1 lines that
do not use ISDN D-channel signaling use the D4 format.
The performance registers contain both user and carrier Extended Superframe Format (ESF)
statistics. The user performance-registers appear in the middle column after the register names,
and the carrier performance-registers appear in the last column:
You can use the Clr Perf N parameters in the Line Diag menu to reset the user performance
registers, but only the carrier can reset the carrier registers. All performance registers are reset
upon power-up or software reset.
Table 5-5 describes the FDL performance registers.
Table 5-5. FDL performance registers
Register name
Description
EE
Displays the number of error events accumulated since the last time
this register was reset. An ESF error event is counted when the
CRC-6 calculations at the receiving end of the T1 span do not match
the CRC-6 calculations at the sending end. A mismatch indicates that
the frame had at least one data error. Error events have no meaning
for D4 lines. Only ESF lines carry the CRC-6 signature used to check
the quality of the PRI line as a whole.
10-500 FDL2 Stats
03:45
ES:000005 000005
US:000000 000000
SS:000000 000000
BS 000000 000000
LF:000000 000000
CS:000000 000000
user registers
carrier registers