Cisco Firepower 1120, Hardware Installation

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Serial Port
For detailed information about the combination ports, see Router Hardware Description, page 13 .
Table 4 SFP Port Specification
Pin Signal Name Input/Output Signal Description
1 VeeT – GND
2 TxFault Output Connects to GPIO
3 TxDisable Input Driven from GPIO
4 MOD-DEF(2) Bidir Bidirectional. Connects to I2C data
5 MOD-DEF(1) Input Connects to I2C Clock
6 MOD-DEF(0) Output Grounded in SFP, indicates SFP is present
7 Rate Select
1
– –
8 LOS Output Connects to GPIO
9 VeeR – GND
10 VeeR – GND
11 VeeR – GND
12 RD- Output Connects to PHY
13 RD+ Output Connects to PHY
14 VeeR – Gnd
15 VccR – 3.3V
16 VccT – 3.3V
17 VeeT – GND
18 TD+ Input Driven from PHY
19 TD- Input Driven from PHY
20 VeeT – GND
1
Rate Select is an optional SFP input that controls receiver bandwidth when used with Fibre
Channel applications. This pin is unconnected.
Table 5 Serial Port Specification
RS-232
1
Pin Signal Description (Abbreviation) DTE DCE
1 DCE ready, ring indicator (DSR/RI) <— —>
2 Received line signal detector
(DCD) <— —>
3 DTE ready (DTR)
—>
<—
4 Signal ground (COM) – –
5 Received data (RxD) <— —>
6 Transmitted data (TxD)
—>
<—