ADTRAN T200 FNID specifications L1-5, Issue 61245201L1-5C

A measure of signal quality for each HDSL loop is displayed in graphic form on the bottom right and left of the screen. The measure is from 0 (poor signal quality) to 9 (excellent signal quality). Guidelines for interpreting the indicators are:

0Noise margin is ≤ 0 dB (≈ 10-7BER)

1-8 Margin measurement above 10-7BER in dB

9Margin is ≥ 9 dB (excellent quality) above 10-7ÊBER

Predicting performance based upon signal quality varies with each loop. Generally, a noise margin of 0 or higher will support a bit error rate of better than 10-7.

The Performance History screen is illustrated in FigureÊ8. At each 15-minute interval, the performance information is transferred to the 15-minute performance data registers accessed from the Performance History screen. At each 24-hour interval, the performance data is transferred into the 24-hour performance data register also accessed using this screen.

At the Current System Status screen, type ÒZÓ in order to reset performance registers to zero at both the Current System Status and Performance History screens.

Figure 9 depicts the FT1 Loopback Options screen while Figure 10 depicts the Self-Test Options screen. Loopbacks and Self-Test may be evoked or terminated using these screens. A status of current loopback conditions is also provided.

Figure 11 shows the Provisioning Options screen. Provisioning may only be viewed from the FNID at all times. Provisioning is controlled from the FT1 DP.

The Troubleshooting Display, shown in Figure 12, graphically presents an FT1 circuit. The unit reviews red, yellow, and blue alarm conditions in the circuit to automatically predict where a fault is located. Once a fault location is suspected, the corresponding portion of the circuit on the screen is highlighted and a message describing the failure will appear.

6 Section 61245201L1-5, Issue 3 61245201L1-5C