AT&T Release 2.0 manual ESF T1 CSU Front Panel, Plugging the CSU into an AC Outlet

Connecting the Control Unit to the Network Interface

Step 4: Plugging the CSU into an AC Outlet

When Steps 1, 2, and 3 are finished, plug the CSU power cord into a 117-VAC outlet.

ESF T1 CSU Front Panel

The ESF T1 CSU front panel consists of LEDs, controls, and test jacks (see Figure 4-7).

DTE LOOPBACK

SEND CODE

ESF T1 CSU

AT&T

AOO

O

UP

U P / D N

Eq

Eq SM

SM

IN OUT

MON MON

IN OUT

-1 +1

O

FRAME

ALARM

LOSS

NEAR END LOOPED

LOW DENS

BPV

LOOPED

CRC ERROR

DIAGNOSTIC

FRAME LOSS

INTERFACE

PULSES

LOCAL

CRITICAL POWER

POWER

FAR END LOOPED

Figure 4-7. ESF T1 CSU Front Panel

Tables 4-18,4-19,and 4-20show the functions of these items.

4-30Installing the Channel Service Unit