Figure 4-7. Esf T1 Csu Front Panel - AT&T MERLIN LEGEND Release 2.0 Installation Section

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
AT&T
O
O
DIAGNOSTIC
INTERFACE
LOCAL
POWER

Figure 4-7. ESF T1 CSU Front Panel

Tables 4-18, 4-19, and 4-20 show the functions of these items.
4-30
Installing the Channel Service Unit
SEND CODE
UP U P / D N
FRAME
LOSS
LOW DENS
LOOPED
FAR END LOOPED
AOO
Eq
IN OUT
ALARM
NEAR END LOOPED
BPV
CRC ERROR
FRAME LOSS
PULSES
CRITICAL POWER
ESF T1 CSU
Eq SM SM
MON MON IN OUT
-1 +1