Page 15 of 254Main Office Configuration for SRG200/400 Release 1.5 Configuration Guide36OverviewContentsThis section contains information about the following topics:Survivable Remote Gateway. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Main office hardware description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Main office requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Optional features to enhance SRG functionality. . . . . . . . . . . . . . . . . . 22Normal Mode and Local Mode overview . . . . . . . . . . . . . . . . . . . . . . . 23Capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Branch office dialing plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Branch office and SRG200/400 Release 1.5 terminology . . . . . . . . . . 34Survivable Remote GatewayThe Survivable Remote Gateway (SRG) extends the desktop feature and userinterface of the CS 1000 to remote IP branch office users and gives them fullaccess to the same applications as the main site. CallPilot, Contact CenterManagement Server (CCMS), and other central applications are shared byremote users to deliver state-of-the-art features and functionality to smallremote offices.The SRG 50 Release 1.0 solution complements the existing SRG200/400Release 1.0 and Release 1.5 product and is intended to be positioned as a cost-optimized platform for small branch offices with up to 32 survivable IP users.The existing SRG200/400 solution continues to provide branch support for up