11InstallationHardware overviewThe Business Services Gateway 8-port (BSG8ew) and Business Services Gateway 12-port(BSG12ew/aw/tw) are integrated multiservice gateway products that provide application-levelsupport for voice, data, and video.The three product variations offered for the BSG12ew/aw/tw are the BSG12ew with EthernetWAN, BSG12aw with ADSL/ADSL2+WAN, and BSG12tw with T1/E1 WAN. These productsare similar in design and differ only in their WAN interfaces. For more information, see“BSG12ew ports and connectors” on page 16, “BSG12aw ports and connectors” on page 17, and“BSG12tw ports and connectors” on page 15.The BSG8ew supports up to 50 users. The BSG12ew/aw/tw supports up to 100 users.The BSG8ew and BSG12ew/aw/tw provide a high-level security set of data features for directconnectivity to an Internet Service Provider (ISP). The BSG8ew and BSG12ew/aw/tw support:• Line-rate forwarding• Layer-2 ethernet switching• Stateful firewall• Multi-scope Dynamic Host Configuration Protocol (DHCP) server• Network Address Translation (NAT)• Virtual Private Network (VPN) application• Integrated 802.11 b/g WiFi Access point providing WPA and WPA2 access• Survivable Session Initiation Protocol (SIP) Proxy and SIP Registrar• SIP User Agent (UA) to connect POTS to VoIP networks• Public Switched Telephone Network (PSTN)• Advanced application-aware QoS capabilities• Web User Interface (WebUI)• Simple Network Time Protocol (SNTP)• OSPFv2 and RIP for dynamic routing• Stateless firewall• SNMPv3Product structureThe BSG8ew and the BSG12ew/aw/tw have the following components and field-replaceable units(FRU).ComponentsThe BSG8ew ships with the following components:• BSG8ew