Avaya 555-233-116 사용자 설명서

Stratum 3 clock

555-233-116

164

Issue 4 October 2002

2. Set the options on the Stratum 3 (ST3) clock board (see

NOTE:

Only SW 1 and SW2 are used. SW1 controls the output of alarm signals
from the Stratum 3 clock board.

3. Set the options on the composite clock timing output board (TOCA) per

4. Set the Stratum 2/Stratum 3 switch to the STRATUM 3 position.

NOTE:

Set switches 1 and 2 according to the distance from the Stratum 3 clock to
the DEFINITY system. Set switch 3 to ON. Set switch 4 to OFF.

Table 17.

ST3 clock board option switch settings

Switch

Status/Results

SW1
Minor alarm
control

OFF = minor alarm never output

ON = minor alarm is output if holdover occurs

SW2
Major Alarm
Control

OFF = major alarm is output and fail lamp lights if 5 VDC
power is lost and 4 kHz output is lost

ON = major alarm is output and fail lamp lights if 5 VDC
power is lost and 4 kHz output is lost and holdover occurs

Table 18.

Composite clock timing output board (TOCA)

Switch

Range in feet (meters)

500

1000

1.0
(0.3)

500
(152)

1000
(305)

1500
(457)

2000
(710)

2500
(772)

3000
(914)

OFF