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Cisco Integrated Services Router Hardware Installation Guide
OL-27407-01
Chapter1 Product Overview
Cisco C891 Series ISRs
FanSome router models do not have a fan, while other models have either one or two fans.
The fans spin at full speed, as a diagnostic aid, immediately after the router is powered up. After the
router has booted, the fans spin as fast as necessary to minimize fan noise while maintaining a safe
internal operating temperature.
The following models have no fan:
•Cisco 892FSP
•Cisco 896VA
•Cisco 897VA
•Cisco 898EA
Power Supply The Cisco 892FSP has a single +12V power supply input. The Cisco 892FSP power connector is
different from the barrel-type connector on other 890 series models. The AC adapter cable connector has
four pins and a built-in locking mechanism. Figure3-33 shows the power adapter connector.
The Cisco 896VA, 897VA, and Cisco 898EA use PoE (12 VDC 43 W, -54VDC 80 W) and non-PoE
(12 VDC 60 W) power supplies.
Power over Ethernet Module The Cisco 880 series ISRs can include an optional Power over Ethernet (PoE) module that provides
power to 802.3af-compliant devices connected to FE ports 0 and 1.
The Cisco 890 series ISRs can include an optional PoE module that provides po wer to 802.3af-compliant
devices connected to FE ports 0, 1, 2, and 3.
The PoE module is an option available only for the Cisco 880 series and 890 series ISRs and requires a
48 V external power adapter.
This function can be added to an 880 or 890 series router by installing the PoE adapter card in the router
and inserting the PoE 48V external power adapter.
Note The Cisco 880 series ISRs with embedded WLAN antennas require a single external power supply: a
30 W power supply for non-POE-enabled routers or a 60W power supply for POE-enabled routers. For
the back panels of some of these routers, see Figure1-29 and Figure 1-31.
The following PoE budget is available:
•C867VAE-POE-W-A-K9: 15.4 W (one port PoE)
•Cisco 880 series: 30.8 W (2 ports each 15.4 W)
•Cisco 890 series: 61.6 W (4 ports each 15.4 W)