Specifications

Chapter 6 Troubleshooting and Diagnostics ASMi-52 Installation and Operation Manual
6-12 Displaying E1/T1 Statistics
ASMi-52
SHDSL all intervals performances ...
INTERVAL CRC LOSWS ES SES UAS
1 0 0 0 0 0
ESC-prev.menu; !-main menu; &-exit; ?-help; @-scroll
Figure 6-12. SHDSL all Intervals Performances
ASMi-52
SHDSL all days performances ...
DAY CRC LOSWS ES SES UAS
1 0 0 0 0 0
ESC-prev.menu; !-main menu; &-exit; ?-help; @-scroll
Figure 6-13. SHDSL all Days Performances
Clearing the SHDSL Statistics

To clear the SHDSL statistics:
• From the SHDSL Statistics menu (see Figure 6-9), select SHDSL Clear
Performances, and press <Enter>.
All SHDSL statistics data is cleared.
6.3 Displaying E1/T1 Statistics
When ASMi-52 includes G.704 E1 port configured to the G732N framing, the
modem has capabilities for collection of the E1 performance diagnostics. Statistics
collection depends on the use of the CRC-4 function for E1 and T1 framing mode
for T1:
• CRC-4 Enabled (E1), ESF framing (T1)
When the CRC-4 functions is enabled, it is possible to monitor end-to-end the
data transmission performance. The error detection is derived from the data
payload by performing a cyclic redundancy check (CRC). The resulting CRC
checksum is transmitted in addition to the raw data bits. The receiving end
recalculates the checksum and compares the results with the received
checksum: any difference between the two checksums indicates that one or
more bits are contained in the current data block being evaluated.
• CRC-4 Disabled (E1), SF framing (T1)
When the CRC-4 option is disabled, ASMi-52 does not support the capabilities
listed above. However, the modem is capable of providing statistics of the
bipolar violations.