Serial Port - Cisco 1120 Hardware Installation

Table 4 SFP Port Specification
Pin Signal Name
1 VeeT
2 TxFault
3 TxDisable
4 MOD-DEF(2)
5 MOD-DEF(1)
6 MOD-DEF(0)
7 Rate Select
8 LOS
9 VeeR
10 VeeR
11 VeeR
12 RD-
13 RD+
14 VeeR
15 VccR
16 VccT
17 VeeT
18 TD+
19 TD-
20 VeeT
1
Rate Select is an optional SFP input that controls receiver bandwidth when used with Fibre
Channel applications. This pin is unconnected.

Serial Port

For detailed information about the combination ports, see
Table 5 Serial Port Specification
1
RS-232
Pin Signal Description (Abbreviation)
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)
Input/Output Signal Description
– GND
Output Connects to GPIO
Input Driven from GPIO
Bidir Bidirectional. Connects to I2C data
Input Connects to I2C Clock
Output Grounded in SFP, indicates SFP is present
1
– –
Output Connects to GPIO
– GND
– GND
– GND
Output Connects to PHY
Output Connects to PHY
– Gnd
– 3.3V
– 3.3V
– GND
Input Driven from PHY
Input Driven from PHY
– GND
DTE
<—
<—
—>
–
<—
—>
Router Hardware Description, page
DCE
—>
—>
<—
–
—>
<—
97
13.