Combo Ports; Irig-B Timing Port - Cisco 1240 Hardware Installation Manual

Hardware Features Detailed Description
D E C . 2 0 1 1 — E F T R E V I E W D R A F T — C I S C O C O N F I D E N T I A L

Combo Ports

The two
identically (ETH 2/1 and ETH 2/2) because the SFP and GE interfaces share physical ports on the router.
The Gigabit Ethernet ports support copper GE connections and the SFP modules support fiber optic GE
connections. Only one instance of each interface (ETH 2/1 and ETH 2/2) can be in use at any time.
These ports automatically detect the type of any connected cable (fiber or copper) and then switch to the
corresponding mode (fiber or copper)
If connections are made to both interfaces of the same name (ETH 2/1 or ETH 2/2), only the first
Note
connection that establishes a link is enabled.
Figure 2-19
Items
1
2

IRIG-B Timing Port

Currently not supported. This hardware feature will be supported in a future software release.
Note
Cisco 1240 Connected Grid Router Hardware Installation Guide
2-26
Gigabit Ethernet Ports and the two
GE Ports and SFP Ports Share Interfaces ETH 2/1 and ETH 2/2
Description
Gigabit Ethernet ports
SFP module ports
Small Form-Factor Pluggable (SFP) Ports
Gigabit Ethernet Connection Type
Copper
Fiber optic
Chapter 2 Router Hardware Description
ports are labeled
1
2
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