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Cisco Integrated Services Router Hardware Installation Guide
OL-27407-01
Chapter1 Product Overview
Cisco 860, 880, 890 Series
Figure 1-23 shows the back panel details of the Cisco 881SRST-W voice router.
Figure1-23 Back Panel of the Cisco C881SRST-W Voice Router
1Primary WAN port1—10/100 FE
1. Depending on the router model, the primary WAN port can be either G.SHDL or 10/100 FE.
6Antenna—captive wireless omnidirectional
dipole WLAN antenna (wireless models only)
2Voice ports—four FXS2/DID3 ports, one
FXO4 port with TBP5 power failover
2. FXS = Foreign Exchange Station.
3. DID = Direct Inward Dialing.
4. FXO = Foreign Exchange Office.
5. TBP = trunk bypass.
7Reset button
34-port 10/100 Ethernet switch6
6. Ports 0 and 1 provide PoE with the optional PoE module installed.
8Power connector
4Serial port—console or auxiliary 9Earth ground connection
5PoE power connector for optional PoE
module7
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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