Start Level 1 Node: SAP for Telecommunications (IS-T)SAP for Telecommunications (IS-T)End Level 1 Node: SAP for Telecommunications (IS-T)
   Start Level 2 Node: Locking of Billing and Invoicing DocumentsLocking of Billing and Invoicing DocumentsEnd Level 2 Node: Locking of Billing and Invoicing Documents
   Start Level 2 Node: Cash Security Deposits in Convergent InvoicingCash Security Deposits in Convergent InvoicingEnd Level 2 Node: Cash Security Deposits in Convergent Invoicing
   Start Level 2 Node: Runtime Optimization During SD Background ProcessingRuntime Optimization During SD Background ProcessingEnd Level 2 Node: Runtime Optimization During SD Background Processing
   Start Level 2 Node: Performance Optimization for External Cash Desk ServicesPerformance Optimization for External Cash Desk ServicesEnd Level 2 Node: Performance Optimization for External Cash Desk Services
   Start Level 2 Node: Transferring Deferred RevenueTransferring Deferred RevenueEnd Level 2 Node: Transferring Deferred Revenue
   Start Level 2 Node: Blocking of Business PartnersBlocking of Business PartnersEnd Level 2 Node: Blocking of Business Partners
   Start Level 2 Node: Correction of Bank DataCorrection of Bank DataEnd Level 2 Node: Correction of Bank Data
   Start Level 2 Node: Credit ProcessingCredit ProcessingEnd Level 2 Node: Credit Processing