EMC VNX Series Hardware Information Manual page 118

Disk-array enclosures
Management (RJ-12) port connector — Figure 99 on page 118 shows the management
port (labeled with two symbols; one depicting a telephone handset with a line through it
and the other depicting a battery). The telephone handset with a line through it symbol
means that you cannot connect telephone type circuits to this connector (see the
following WARNING). This port connects the ICM (A and B) ports to the SPS (A and B) ports,
respectively.
The ICM (RJ-12) port is a LAN port not a WAN port. LAN ports contain safety extra-low
voltage (SELV) circuits, and WAN ports contain telephone-network voltage (TNV) circuits.
An RJ-45 (or TNV-type) looks the same as the RJ-12 except for two very important
differences. An RJ-45 is an 8-wire modular jack. The RJ-12 is a six-wire modular jack. The
RJ-45 plugs and jacks are wider than their RJ-12 counterparts - 7/16" vs 3/8". An RJ-45
plug won't fit into an R-J12 jack. But an RJ-12 plug will fit into an RJ-45 jack. Use caution
when connecting cables. To avoid electric shock, do not attempt to connect TNV circuits
to SELV circuits.
The battery symbol means that you can connect a standby power supply (SPS) to the port.
VNX-000652
Figure 99 ICM RJ-12 port
The cable connecting the ICM to the SPS is an RJ-12 to RJ-12. It has an RJ-12 adapter (ICM
side) on one end and a RJ-12 (SPS side) adapter on the other end.
USB — The USB port (Figure 100) connects a USB cable to the blue light on the front
bezel.
Figure 100 4U, 60 DAE USB port
4U, 60 DAE ICM enclosure ID (enclosure address) and bus ID — On the rear of the ICM (A
and B), an ICM enclosure ID indicator is provided. This ID indicator is a seven-segment
LED display for displaying decimal numbers. The ICM enclosure ID appears on both ICMs
(A and B) which is the same ID number. The enclosure ID is set at installation (Figure 101
on page 119).
Each ICM includes a bus (loop) identification indicator. This indicator includes two
seven-segment LED displays for displaying decimal numbers. The SP initializes the bus ID
when the operating system is loaded (Figure 101 on page 119).
118 EMC VNX8000 Hardware Information Guide