
Table 2. Front Panel Status Indicator LED
LED | Description |
Flashing Red about | Indicates an HDSL Cyclic Redundancy Check (CRC) error has |
once per second | occurred between the |
Flashing Red rapidly | Indicates an HDSL CRC error has occurred between the |
| |
Flashing Yellow about | Indicates a Network Doubler Unit (NDU) loopback is in effect in |
once per second | the |
| upstream span. |
Flashing Yellow | Indicates a Customer Doubler Unit (CDU) loopback is in effect in |
rapidly | the |
| downstream span. |
Flashing Green about | Indicates synchronization is being attempted between the |
once per second | |
Flashing Green rapidly | Indicates synchronization is being attempted between the |
| |
Steady Yellow | Indicates the HDSL margin is less than the margin threshold |
| provisioned for the circuit. |
Steady Green | Indicates HDSL frame synchronization has been achieved |
| between the |
| modules. |
April 30, 2003 | 5 |