Analog Devices CRA-200 RecommendedNumberofSimultaneousCalls,

_____________________________ CRA-200 Quick Installation Guide
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tothedevice’sLANport).Therefore,itisimportantthatyou
considerthenumberoftotalphonelinesyouwillbeattachingto
eachCRA‐200deviceinadditiontothetwolinesthatarealready
available.Inthesampleconfigurationshownbelow,whereyou
haveoneCRA‐200boxwithVPNenabledandtwoadditional
Internetphonedevicesforatotalof4phonelines,a128Kbps
Internetconnectionwillallowfornomorethan4simultaneous
phonecallsatagiventimewhenusingcodecG.729/Latency
Configurationof60ms(seepage10forabriefexplanationof
CodecLatencyConfiguration).
RecommendedNumberofSimultaneousCalls
Thefollowingchartdepictsageneralguidelinerangeforthe
recommendedmaximumnumberofsimultaneouscallswhen
VPNcapabilityisenabledforeachcodec/Latencyconfiguration.
Theamountofallowablesimultaneousphonecallsanditscall
qualityaredirectlyrelatedtobandwidthavailabilityandits
utilization.
DSL
Speed 729 90ms 729 60ms 729 30ms
128k 4-6 max. calls 4-5 max. calls 2-3 max. calls
256k 10-12 8-10 5-6
384k 17-19 13-15 8-9
512k 23-25 18-20 11-13
768k 36-38 28-30 17-19
1024k 48-51 38-40 23-26
DSL
Speed 723 90ms 723 60ms 723 30ms
128k 5-7 4-5 2-3
256k 12-14 9-11 5-6
384k 18-20 15-17 8-9
512k 26-28 20-22 11-13
768k 41-43 32-34 17-19
1024k 56-58 43-45 23-26
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