Specifications
iv IBM Voice Over Frame Relay Perform Guide
4.0.4 BRSSuper-Class.......................................59
4.1 Review of IBM 2212 Frame Relay Basics ........................ 63
4.1.1 DLCI (Data Link Connection Identifier)....................... 63
4.1.2 FullyMeshedandPartiallyMeshed......................... 64
4.1.3 Local Management Interface (LMI). ......................... 64
4.1.4 CommittedInformationRate(CIR)..........................65
4.1.5 Bc (Committed Burst), Be (Excess Burst) and Tc (Calculated Time) 66
4.1.6 TcValueConsiderationforVoFR........................... 67
4.1.7 MaximumInformationRate(MIR) ..........................68
4.1.8 MinimumInformationRate................................ 68
4.1.9 CIRMonitoring.........................................69
4.1.10 Congestion Monitoring .................................. 69
4.1.11 Discard Eligibility (DE) ..................................69
4.1.12 FRF.11 ............................................. 72
4.1.13 FRF.12 ............................................. 72
4.2 Sample Scenarios with IBM 2212 and IBM 9783 ...................73
4.2.1 Sample Scenario of IBM 2212 within the Branch . .............. 73
4.2.2 Sample Scenario of IBM 2212 Any-to-Any Calling Plan . . ........82
4.2.3 Sample Scenario of 2212 with PBX and PSTN. . . ..............93
4.2.4 IBM 9783, 2212 at Headquarters and 2212 at Branch Offices . . . . 105
4.2.5 Sample Scenario with IBM 9783 and 2212 at Two HQs and 2212 at
BranchOffices............................................. 118
4.2.6 Sample Scenario with Hunt Group Facility in IBM 9783 . . .......136
Chapter 5. Performance Tuning, and Monitoring ................... 157
5.1 Tuning IBM 221X Routers for a Voice over Frame Relay Network ..... 157
5.1.1 TuningFrameRelayInterfaces........................... 157
5.1.2 Consider Voice Bandwidth Utilization....................... 158
5.1.3 PVCsCarryingVoiceOnly............................... 159
5.1.4 PVCswithVoiceandData............................... 159
5.1.5 PVCsCarryingBothVoiceandData....................... 159
5.1.6 TuningPVCswithNoVoiceTraffic ........................ 160
5.1.7 Buffers..............................................160
5.1.8 Tuning Bandwidth Reservation System . . . .................. 161
5.2 Tuning the 9783 for a Voice over Frame Relay Network ............ 162
5.2.1 EfficiencyversusDelay................................. 163
5.2.2 DigitalT-1/E-1Interfaces................................ 163
5.2.3 MakingVoiceAdjustments............................... 163
5.2.4 GuidelinesforCorrectingVoiceLevels ..................... 164
5.3 Monitoring Voice over Frame Relay on IBM 2212 Accessibility ....... 166
5.3.1 TheSTATUSCommand ................................167
5.3.2 TheCALLSCommand.................................. 168
5.3.3 NewSubsysteminELS:VOIC............................ 169
5.4 Monitoring IBM 9783 ....................................... 174
5.4.1 TracingaCall ........................................ 174
5.4.2 UsingStatisticsCommand............................... 174
Appendix A. Sample Statement of Work ............................181
A.1 Overview ....................................................181
A.2 StatementofWork.............................................181
A.2.1 ScopeofService..........................................181
A.3 KeyAssumptions..............................................182
A.4 Customer Responsibilities . . .....................................184