System component description
VNX5700 Hardware Information Guide 29
The 1U SPS (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.
Figure 16 1U SPS RJ-12 port
Table 12 lists the 1U SPS (RJ-12) pin signals used on the connector.
RJ-12 modular jack to micro DB-9 cable
The cable connecting the 1U SPS to the SP is an RJ-12 to micro DB-9 cable (plug). It has an
RJ-12 connector (SPS side) on one end and a micro DB-9 connector (SP side) on the other
end. Figure 17 shows an example of an SPS A to SP A cable.
Figure 17 Example of SP A (micro DB-9) SPS (RJ-12) cable
VNX-000290
Table 12 1U SPS (RJ-12) port and connector pinout
RJ-45 pin Signal Description
1 RTS/DSR Ready to send Data transmit
ready
2 Shield Shield
3TXDTransmit data
4RXDReceive data
5GNDGround
6 CTS/DCD Clear to send Data
VNX-000283
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