Cisco WS-C2950-24 Hardware Installation Guide - Page 21
Overview of the Routers, Cards EHWICs, Internal Services Modules ISMs - switch
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1 C H A P T E R Overview of the Routers OL-18712-02 Cisco Integrated Services Routers Generation 2 (ISR G2) offer data functionality through Gigabit Ethernet ports and security functionality with a virtual private network (VPN) accelerator on the motherboard. Additional security features are available with add-on hardware and software. Cisco 2900 series and Cisco 3900 series routers also provide voice IP telephony with digital signal processor (DSP) capability; and voice gateway, DSP farm, IP-to-IP gateway, Cisco Unified Communications Manager Express (CUCME) via Cisco IOS. Cisco Unity Express (CUE) is provided through the use of add-on hardware. This series of ISRs have new slots that support next generation Enhanced High-Speed WAN Interface Cards (EHWICs), Internal Services Modules (ISMs), Packet Voice Data Modules (PVDM3s), Service Modules (SMs), and Services Performance Engines (SPEs). Access to the Cisco Multi-Gigabit Fabric (MGF) facilitates connection between switch ports on the ISR without utilizing all of the external ports. A logical GE interface on the ISR connects external and internal modules through the MGF for improved LAN and WAN switching. Table 1-1 Series Cisco 2900 Cisco 3900 ISR G2 Models Routers • 2901 • 2911 • 2921 • 2951 • 3925 • 3925E • 3945 • 3945E The following sections are provided in this chapter: • Chassis Views, page 1-2 • Locating the Serial Number, PID, VID and CLEI, page 1-12 • Hardware Features, page 1-16 • Slot, Port, and Interface Information, page 1-27 • LED Indicators, page 1-29 • Specifications, page 1-32 Cisco 2900 Series and 3900 Series Hardware Installation Guide 1-1