Installation and Test
950-734-100-01, Revision 01
8
December 18, 1998
PLL-734 List 1
I
NSTALLING
THE
COLU
You can install the COLU in any slot except the three positions labeled COMMON, MUX 1, and MUX 2. Refer
to the cabling tables provided in the COTS documentation for slot and Telco cabling assignment.
1
Open the retaining latch on the front of the COLU.
2
Insert the COLU into the card guides in a vacant slot in the COTS that corresponds to the location of the
wiring from the CO switch (see
Figure 3
).
3
Engage the retaining latch to hold the card in place.
Figure 3.
Installing the Card into a Shelf
I
NITIALIZATION
S
EQUENCE
When the COLU is correctly seated in the COTS, the following events occur in the order listed below:
•
If only one RT is connected to the COLU, only one column’s Status LED is On, the other Status LED is
Flashing.
•
If two RTs are connected to the COLU, the A and B Status LEDs are On simultaneously.
After installing the COLU , the following events occur:
•
All LEDs briefly blink On and then Off, with the exception of the PWR and FAULT LEDs that remain
Flashing.
•
After about 5 seconds, the COLU applies power and goes into start-up mode. If an RT is present and no PGFs
or PFOs are detected, the PWR LED is On green. If the line is Offhook, the HDSL power is not applied until
it goes Onhook for at least 3 seconds. There is a 5-second delay before turning on the HDSL power.
•
After applying the HDSL power, the tests for overload or underload conditions are performed. If the HDSL
line power is normal, the PWR LED is On and HDSL start-up is initiated.
PLL-734