46 System componentsTable 10DDCH and DCHI fixed allocation map (face-to-faceplate of the E1/T1 card) eight span examplewith package 418 equippedMGC IPEcard (slot)numberrepresentingthe E1/T1span inLD 17Pure configurationof DDCH (NTBK51AA/NTBK51CA)8 DDCH interfaceswith Port 0 and 1enabledPure configurationof onboardDPNSS/DASS(DCHI)8 DCHI interfaceswith Port 1 enabledPossible mixedconfiguration4 DDCH Interfaces+ 4 DCHI interfacesPRI GatewayE1/T1 spannumber1 Upper left DDCHPort 0DCHI Port 1 Upper left DDCHPort 012 Upper left DDCHPort 1DCHI Port 1 Upper left DDCHPort 123 Upper right DDCHPort 0DCHI Port 1 Upper right DDCHPort 034 Upper right DDCHPort 1DCHI Port 1 Upper right DDCHPort 145 Lower left DDCHPort 0DCHI Port 1 DCHI Port 1 56 Lower left DDCHPort 1DCHI Port 1 DCHI Port 1 67 Lower right DDCHPort 0DCHI Port 1 DCHI Port 1 78 Lower right DDCHPort 1DCHI Port 1 DCHI Port 1 8ATTENTIONFor the PRI Gateway, the following software package for the functionality thatallows the use of port 0 or port 1 is provided in CS 1000 Extended MediaGateway PRI (MGP) package 418PRI Gateway span usageThe PRI Gateway allows flexible configuration DCH interface andB-channels on the E1/T1 card.For some interface types, the PRI Gateway also supports a nB+Dfeature by having a single D-channel interface (attached with DDCHdaughterboard) support several E1/T1 spans. Therefore, it is possiblethat one span is not configured with any DCH interface but is used forB-channels which are served by D-channel interface defined in anotherspan.Nortel Communication Server 1000Media Gateway 1000E PRI Gateway Installation and CommissioningNN43041-311 04.01 4 June 2010Copyright © 2007-2010 Nortel Networks. All Rights Reserved.
