Installation Manual 42 Document #: LTRT-94704
Mediant 3000 & IPmedia 3000
2.9.2.1 DC Power Entry Module
The device's chassis is supplied with two PEM/DC/3K Power Entry Modules (PEM)
modules (housed in its rear panel), for connecting the device's chassis to the DC power
sources. The dual PEMs allow connection to two independent DC power sources, providing
electrical input (power) redundancy in the event of a DC power source failure. The device
uses complete power entry separation between the two existing DC power supplies in the
system.
Figure 2-22: Power Entry Module (PEM)
The table below describes the PEM module's connectors and LEDs.
Table 2-23: PEM Front View Component Descriptions
Item # Label Description
1
ETH
PEM with 6310 blades: N/A (GbE interface is provided by the
Ethernet ports on RTM-6310).
PEM with 8410 blades: Two 10/100BaseT Ethernet interfaces (RJ-
45 ports) for connection to OAMP and Control networks (i.e.,
Physical Network Separation feature). Their operating status is
provided by the ETH LEDs on the 8410 blade (refer to ''LEDs'' on
page 28).
Note: 8410 Blades are applicable only to Mediant 3000.
2
BITS/SETS
Standard E1/T1 RJ-48 connector for synchronization and timing source.
Note: Applicable only to Mediant 3000.
3
DC IN
-48 VDC power inlet.
4
PWR IN
Power LED (green color) - incoming primary voltage (-48 VDC)
detected.
5
PEM RDY
Backplane power is alive (secondary PEM power is normal and active).
The LED lights up green.
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