G.826 Far End; Using Loopback Tests - 3Com 3C10402B Administrator's Manual

188 C 8: PSTN G
HAPTER

G.826 Far End

Using Loopback
Tests
C
ATEWAY ONFIGURATION
4 Click the Performance Data tab.
5 Click G.826 Near End.
6 See the online Help for details for more information.
To view E1 Span far end statistics:
1 Log in to the NBX NetSet utility using the administrator username and
password.
2 Click PSTN Gateway Configuration > ISDN PRI Spans.
3 Click a MAC address.
4 Click the Performance Data tab.
5 Click G.826 Far End.
6 See the online Help for details for more information.
The 3C10116D T1 and 3C10165D E1 cards can respond to commands
from the Central Office to loop back data at different points for
diagnostic purposes.
You use the NBX NetSet utility to enable each loopback test and to
initiate the Local and Framer loopback tests. The Central Office, or test
equipment that emulates Central Office equipment, must initiate Line
and Payload loopback tests.
For detailed logging information, you can enable TEP logging before you
enable loopback testing. However, to set up logging and interpret the
logs are advanced tasks that require help from a technical support
technician. You can see a simple pass/fail result by viewing the span
status, as described in
page 189. To see the loopback test status of all spans, click PSTN
Gateway Configuration > Digital Line Cards > Config & Status Report.
The cards loop back data at the following points and with the following
characteristics:
Line Loopback — A loopback in which the signal returned toward
■
the source of the loopback command comprises the full 1.544 Mbits/s
signal with bit sequence integrity maintained, no change in framing,
and no removal of bipolar violations.
"Enabling or Disabling Loopback Tests" on