General DataCommc SpectraComm ES, Installation & Operation Manuals

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Installation & Connections Shelf and Card Connections
076R204-000 SpectraComm Ethernet Switch 2-7
Issue 2 Installation and Operation Manual
Interface Port Descriptions
Ethernet (LAN) Ports
(Interface “A”, “B” and “C” in Figure 2-1 and Figure 2-2 )
All SC-ES Ethernet ports provide 10/100BASE-T Ethernet connectivity and require an RJ45-to-
RJ45 straight-thru or crossover cable (GDC S-078H010-XXX or S-078H011-XXX). The table
below describes Ethernet port pinouts. Note that any port can be used as a logical uplink port to
cascading SC-ES cards, SC-IP cards or other hub/bridge devices.
• For the SC-ES 9-Port unit, the upper connector at the rear panel is Port 9.
• For the SC-ES 18-Port unit, the upper connector at the rear panel is Port 9 and the
lower connector is Port 18.
Note
The Ethernet port pinouts shown in Table 2-3 apply when Auto MDI/MDIX is turned off and the MDIX option
is set to No Force. When SC-ES is set to Auto MDI/MDIX, the actual Tx and Rx pinouts depend on the result
of Auto MDI/MDIX negotiation.
Craft Port
(Interface “D” in Figure 2-1 and Figure 2-2 )
The SC-ES Craft (or console) port is an RS-232-compatible DB25 connector at the rear shelf slot.
This interface supports 9600bps asynchronous data and provides terminal interface control of the
unit by direct connection to a local VT100-compatible ASCII terminal. Connection to the Craft port
requires a DB25-to-RJ45 adapter (GDC P/N 029H210-001). The table below describes the Craft
port pinouts
Table 2-3 Ethernet LAN Port Pinouts (RJ45s)
RJ45 Pin Signal Direction Description
1 Rx+ To SC-ES Receive Data
2 Rx- To SC-ES Receive Data
3 Tx+ From SC-ES Transmit Data
6 Tx- From SC-ES Transmit Data
Table 2-4 Craft Port Pinouts (DB25)
DB25 Pin Signal Direction Description
7 Signal Ground - Signal Ground
3 RD From SC-ES Receive Data - Supervisory data to the terminal
2 SD To SC-ES Transmit Data - Supervisory data from the terminal