User`s guide

HTML SET UP & DIAGNOSTIC
Failsafe ring SHDSL switch User’s guide ref 9014809-03 Page 39
• Once the connection is established, select the “Diagnostic” menu, and
then the “Network status” menu and then the “Statistics” menu.
Check the “SNR margin” is greater than 6. Otherwise decrease the data
rate.
• Select the “Diagnostic” menu, and then the “Logs” menu.
Check the XSRING remains permanently connected. Disconnections
must be very rare. If disconnections are frequent, check the line itself and
/ or decrease the data rate.
13.6 Checking the RING function
Checking the safe situation
• Check the failsafe ring led is green and the digital output is closed.
• Connect a PC to one of the XSRINGS switches and check you can ping any of the
devices of the network.
• Check the response delay is appropriate :
the XSRING latency is more or less 4 ms; it means that if the ring includes 5
XSRINGs, the response time can be up to 5 * 4 ms * 2 = 40 ms.
The latency of the device must be added to that value.
Checking the line failure situation
• Disconnect one line;
• Check that the failsafe ring led turns red and that the digital output opens,
• Check an SNMP trap is sent to the SNMP server (if that function has been set up)
• Check the communication remains possible between the different
devices
Remark : The response time of some devices may change.
• Connect the line again.
• Check the failsafe ring led turns green and the digital output is closed.
• Check an SNMP trap is sent to the SNMP server (if that function has been set up)