DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
LED Interpretation
7-9DS1 CONV (TN574/TN1654) Circuit Pack LEDs
7
DS1 CONV (TN574/TN1654) Circuit
Pack LEDs
The TN574 and the TN1654 LEDs provide an indication of the state of the DS1
Converter and facilities, and are covered in the following sections of this
document.
TN574 Circuit Pack LEDs
Seven LEDs provide an indication of the state of the DS1 Converter (DS1 CONV)
TN574 circuit pack and the DS1 facilities. The top group has the standard red,
green and yellow LEDs. The red and green LEDs have the traditional meaning,
where red indicates an alarm condition, and green indicates testing in progress.
The four green LEDs on the bottom indicate the status of the DS1 facilities (see
following section).
Table 7-3. Switch Node Interface Yellow Led Flashing States
LED on LED off Condition
0.1 sec 0.1 sec Fiber Out-of-Frame. This state indicates a failure of test
#238, which may be caused by absence of the opposite
end EI or Switch Node Interface, a broken or missing
fiber, or a missing lightwave transceiver on either
endpoint.
0.5 sec 0.5 sec In Frame
— No Neighbor. This state corresponds to a
failure of test # 237, usually due to a failure of this SNI,
or the EI or SNI at the opposite of the fiber. This
condition may also be due to a faulty Switch Node
Clock.
solid on SNI Active. This is the normal state for an active SNI.
solid off SNI Standby. This is the normal state for a standby SNI
in systems with a duplication option.
