RAD Data comm ASMi-52 Displaying E1/T1 Statistics, Clearing the Shdsl Performance Statistics

Chapter 6 Troubleshooting and Diagnostics		Installation and Operation Manual
		ASMi-52
	SHDSL all intervals local/remote performances ...
	Line A	Line B
	INT CRC LOSWS ES SES UAS	CRC LOSWS ES SES UAS

ESC-prev. menu; !-main menu; &-exit; ?-help; @-scroll

Figure 6-5. SHDSL All Intervals Local/Remote Performances

	ASMi-52
SHDSL all days local/remote performances ...
Line A	Line B
DAY CRC LOSWS ES SES UAS	CRC LOSWS ES SES UAS

ESC-prev.menu; !-main menu; &-exit; ?-help; @-scroll

Figure 6-6. SHDSL All Days Local/Remote Performances

Clearing the SHDSL Performance Statistics

To clear the SHDSL Port Performance statistics:

•From the SHDSL Port Performances menu (see Figure 6-2), select SHDSL Clear Local Performances or SHDSL Clear Remote Performances, and press <Enter>.

All SHDSL statistics data are cleared.

Displaying E1/T1 Statistics

When ASMi-52 includes a G.704 E1/T1 port configured to the G732N framing, the modem has the capabilities to collect E1/T1 performance diagnostics. Statistics collection depends on the use of the CRC-4 function for E1 and T1:

•CRC-4 Enabled (E1), ESF framing (T1)

When the CRC-4 functions are enabled, it is possible to monitor end-to-end data transmission performance. 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 bipolar violations.

6-4 Monitoring Performance ASMi-52 Ver. 2.5