32 Setting up the main office• information which allows the administrator to create an NCS (H.323Gatekeeper or SIP Redirect Server) entry for the SRG• if using advanced routing, such as tandem dialing between systems,local PSTN number for the SRG and the internal SRG routing codesthat will allow the main office to connect to the SRG and to tandem overthe SRG PSTN lines, is requiredUse Table 4 "SRG information required for the main office configuration"(page 32) to record the information before setting up the SRG on the mainoffice server.Table 4SRG information required for the main office configurationSRG parametersSRG public IP addressH.323 ID (required for requests to NCS)Each H.323 ID in the node should match SIP endpoint namefor this system in pure SIP environment.List of types and number of IP PhonesTelephone types are hard-coded to the Terminal Numbers(TN) and the main office. Therefore, install the same type of IPPhones to the coordinating record on the SRG.PSTN number to dial into the SRG (in local mode)Destination codes (steering codes) to route the main office callsto the SRG and out through the SRG PSTN linesIP Ports that affect SRG traffic with the main office and havebeen assigned firewall filtersFor further information on port configuration, see Convergingthe Data Network with VoIP (NN43001-260) or SRG50Configuration Guide (NN40140-500).Main office information required by the SRGThe main office administrator must supply numerous main office settings tothe SRG installer so that the SRG can be efficiently configured. In addition,the main office administrator needs to supply the following information:• a list of the terminal record numbers (TN)• a list of BUID (Prime DN)• if using advanced routing, such as tandem dialing between systems,main office routing (steering) codes, are requiredNortel Communication Server 1000Main Office Configuration Guide for SRG 50NN43001-307 02.02 StandardRelease 5.0 3 December 2007Copyright © 2005-2007, Nortel Networks.