Cisco 881 SRST Hardware Installation Guide - Page 43

Chapter 1 Product Overview Hardware Features Table 1-10 Hardware Features Available in Cisco 860 Series, Cisco 880 Series, and Cisco 890 Series ISRs (continued) Feature Real-time clock (RTC) USB port PoE11 G.SHDSL12 port 3G13 card slot Dying gasp Data BRI port V.92 modem FXO16 port FXS17/DID18 port Description 860 Series 880 Series 890 Series RTC provides nonvolatile date and time when the router is powered on. The RTC is used for verifying the validity of the Certification Authority stored on the router. It is backed up by a nonreplaceable lithium battery. 866VAE, 867VAE, 866VAE-K9, 867VAE-K9 All models All models Supports USB 1.1. Provides connection for USB devices such as security tokens and flash memory. The Cisco 880 series routers have a single USB port; the Cisco 890 series routers have two USB ports. 866VAE, 867VAE, 866VAE-K9, 867VAE-K9 All models All models Cisco 860VAE series routers have one USB 2.0 port on the rear panel for temporary installation of a Cisco-approved USB memory device for maintenance purposes only. The port supports only USB 2.0. Refer to the product datasheet for the list of supported USB flash memory devices. Note The Cisco 860VAE series router USB port does not support eToken. (Optional) Provides power for 802.3af-compliant devices - (such as phones) that are connected to the router. Models with Models with PoE PoE The Cisco 880 series routers support a 2-port PoE module; the Cisco 890 series routers support a 4-port PoE module. Provides 2-wire or 4-wire connection to a G.SHDSL - network. 888 - Provides backup data link. - 3G models - Detects when the router is losing power, and sends a power-fail signal to warn the DSLAM14 about the impending line drop. 866VAE, xDSL - 867VAE, models 866VAE-K9, 867VAE-K9 Provides backup and remote management functions by - connecting to the ISDN service provider if the main VDSL or G.SHDSL link fails. xDSL 892 models, except for the 3G and SRST15 models Provides dial backup and remote management functions if - the main WAN link fails. - 891 An FXO interface connects local calls to a central office or - PBX. This is the interface a standard telephone provides. 881 SRST - An FXS interface connects directly to a standard telephone, - fax machine, or similar device. This interface supplies ringing voltage and dial tone to the station. SRST - models Cisco 860 Series, Cisco 880 Series, and Cisco 890 Series Integrated Services Routers Hardware Installation Guide OL-16193-07 1-29