Sfp Ports - Dell PowerConnect 2816 User Manual

Table 2-7. RJ-45 Pin Number Allocation for 10/100/ 1000BASE-T Ethernet Port
Pin No Function
6 TxRx 3-
7 TxRx 4+
8 TxRx 4-

SFP Ports

The PowerConnect 2824 switch supports two SFP transceivers combo ports, and the PowerConnect 2848
switch supports four SFP transceivers combo ports for various fiber-based modules (1000BASE-SX or
1000BASE-LX). Only one of the two physical connections of a combo port can be used at any time. The
system can switch from the RJ-45 to the SFP (or vice versa) without a system reset. The system
automatically detects the media used on a combo port, and utilizes this information in the control
interfaces.
PowerConnect 2824 switch supports SFP diagnostics. The optical transceiver provides access to a set of
parameters that can be monitored and displayed to the system administrator.
NOTE:
If both RJ-45 and SFP ports are present, the SFP port will be the active port, whereas the RJ-45 port will be
disabled and ignored.
The pin number allocation for the SFP ports is listed in the following table.
Table 2-8. SFP Pin Connections
Pin No Use
1 Transmitter ground (common with receiver ground)
2 Transmitter fault
3 Transmitter disable; laser output disabled on high or open.
4 Module definition 2; data line for serial ID.
5 Module definition 1; clock line for serial ID.
6 Module definition 0; grounded within the module.
7 Rate select; no connection required.
8 Loss of signal indication; logic 0 indicates normal operation.
9 Receiver ground (common with transmitter ground)
10 Receiver ground (common with transmitter ground)
11 Receiver ground (common with transmitter ground)
12 Receiver inverted data out; AC coupled.
13 Receiver non-inverted data out; AC coupled.
14 Receiver ground (common with transmitter ground)
Dell PowerConnect 28xx Systems User Guide
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