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Cisco Integrated Services Router Hardware Installation Guide
Chapter 1 Product Overview
Cisco 860, 880, 890 Series
Figure 1-23 shows the back panel details of the Cisco 881SRST-W voice router.
Figure 1-23 Back Panel of the Cisco C881SRST-W Voice Router
1 Primary WAN port
1
—10/100 FE
1. Depending on the router model, the primary WAN port can be either G.SHDL or 10/100 FE.
6 Antenna—captive wireless omnidirectional
dipole WLAN antenna (wireless models only)
2 Voice ports—four FXS
2
/DID
3
ports, one
FXO
4
port with TBP
5
power failover
2. FXS = Foreign Exchange Station.
3. DID = Direct Inward Dialing.
4. FXO = Foreign Exchange Office.
5. TBP = trunk bypass.
7 Reset button
3 4-port 10/100 Ethernet switch
6
6. Ports 0 and 1 provide PoE with the optional PoE module installed.
8 Power connector
4 Serial port—console or auxiliary 9 Earth ground connection
5 PoE power connector for optional PoE
module
7
7. The Cisco 880 series ISRs can include an optional PoE module that provides power to 802.3af-compliant devices connected
to ethernet ports 0 and 1. If this feature was not configured with the factory order, you must order and install the Field
Replaceable Unit (FRU) to enable the PoE function. For this you either need the FRU “800-IL-PM=2” or “800G2-POE-2”.
If your device has a separate PoE inlet, use the 800-IL-PM=2, if it has one combined inlet (a description saying “POE
OPTION REQUIRES 5A POWER ADAPTOR”), then use the 800G2-POE-2.
10 Kensington security slot
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