Nortel Networks NTRN10AN, 3500 manual Path trace, Remote alarm LED indicator, Tbos report format

2-60Operation, administration, and maintenance (OAM) features

Note: Although TBOS mapping assignments are set from the head-end network element, you can retrieve TBOS from any remote network element.

The other network elements in the monitored span are mapped to TBOS display positions of the head-end network element. The order in which network elements are assigned to the TBOS numbers is arbitrary. All display numbers, including number one, can be assigned at any time.

The TBOS display is retrieved from the TBOS head-end network element only. If you try to retrieve the TBOS display from another network element, the display is blank.

Remote alarm LED indicator

The remote alarm LED at the TBOS head-end network element indicates an alarm at another network element in the TBOS monitored span. The remote alarm LED does not turn on if an alarm is raised at a network element that has not been mapped into the TBOS display.

All network elements in a network should be included in the TBOS display mapping.

TBOS report format

The report generated by opening the TBOS dialog box shows the TBOS mapping assignments and the current alarm status of all assigned elements in the monitored span. In the screen, adjacent to each network element (NE), are columns containing periods (.), asterisks (*), or question marks (?).

•A period indicates normal status.

•The asterisks under the display header row symbols CR, MJ, MN, E1, E2, E3, E4, and RM, correspond to alarm conditions at each network element. These represent critical, major, and minor alarms, the first four environmental alarms in numeric order, and the remote alarm indicator, respectively.

•Question marks show that the network element has not been found in the TBOS traffic flow. This can mean:

—the network element is not functioning

—the network element cannot be reached

—the NE name has been changed but not updated in the TBOS display page

Path trace

Path trace is a 64-byte ASCII string transmitted through the J1 byte of the STS path overhead (POH). The 64-byte format provides the user the ability to input a 62-byte ASCII character string.

OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004