ADTRAN MX2800 - Figure 2-1. DC Power Connector; Table 2-1. DC Connector Symbol Definitions

Chapter 2. Installation and Operation
61200290L1-1 MX2800 User Manual 2-3
Figure 2-1. DC Power Connector
Table 2-1. DC Connector Symbol Definitions
The chassis should be connected to an earth ground using the ground stud
located between the AC and DC power sources on the rear panel.
PWR
FAIL
PWR
FAIL
PWR
FAIL
Symbol Definition
PWR FAIL Battery backup connection. If AC fails, a trap is sent to
alert user.
- Negative side of DC power source (usually -48V)
RET Positive side of DC power source (usually ground)
Frame Ground