24 OverviewFigure 1Branch Office associated with a CS 1000E main officeMain Office and Branch Office MigrationAll Main Office call servers in CS 1000 Release 5.0 are large system based.A CS 1000 Small System Main Office is no longer supported. Since all CS1000 Release 5.0 Small System Controller (SSC) based Main Offices havebeen migrated to Call Processor Pentium Mobile (CP-PM) Call Servers, theMain Office TN (MOTN) Type in a Branch Office will always be set to thelarge system MOTN Type.In a system where the Main Office has been migrated from a SSC to CP-PMcall server, the LD 20 PRT on the branch will not correctly display the MOTNusing the small system TN format until the branch has been migrated orupgraded. In the case where the branch is SSC based, the LD20 PRT willremain incorrect until the Branch Office Call Server has been migrated to aCP-PM call server. In the case where the branch is already a large system(CP-PII or CP-PIV), then the LD 20 PRT on the branch will remain incorrectuntil the branch has been upgraded to CS 1000 Release 5.0.MG 1000B (MGC) compared to the MG 1000B (SSC)The MG 1000B with MGC has a number of differences in hardwarecapability when compared with Release 4.5 gateways.The MGC has six Ethernet interfaces for connecting to external networkingequipment. Three are reserved for ELAN connections and three arereserved for TLAN1 connections. The six external Ethernet interfaces onthe MGC are set to Auto Negotiate mode by default. You can change thesettings for ports 1E, 2T, E and T to 100 Mbps full duplex by using theNortel Communication Server 1000Branch Office Installation and CommissioningNN43001-314 01.02 StandardRelease 5.0 20 June 2007Copyright © 2007, Nortel Networks.
