Uji Kelayakan Jaringan Lokal Universitas Jenderal Soedirman Untuk Implementasi VoIP
Abstract: UNSOED has LAN
connection which covers almost all of its units, with minimum bandwidth
consupmtionat anaverage of275,318 Kbpsfrom a total of 3 Mbpsso we may apply
VoIP system in order to replace voice communication system whichis still using
PSTN and PABX. Thereforewe need to know aboutjitter and packet loss ofLAN,and
also the codec needs tobedetermined due to voice quality expected and also
bandwidth consumpted. Measurementscarried out in two scenariosbased on
topologies used in UNSOED (star and ring), in the first scenario (star and
ring)server placed on serverfarm meanwhile the second scenario(ring) server
placed on Pertanian node. Codec adjusted to the available bandwidth capacity
and total of phone number that has to handled. The result show that 0,759 ms
jitter obtained from scenario 1 and 0,513ms from scenario 2, both of them
included in good category with 0-20 ms of range value, otherwise 0% of
packetloss obtained from both scenarios these indicated that LANincluded in
good category. There is iLBCcodec with 30 ms packet size which is the
mosteconomic on bandwidthcost among G.729, G.711, and iLBC (20 ms), because it
cost1995,84Kbpsof total bandwidth usedforhandling 140 phone number. Beside
that, it has good voice quality with 4,138996 MOS value. So if we use iLBC (30
ms) codec on the VoIPsystem, there will be still a lot of free bandwidth which
can used for other applications, it is about 695,873 Kbps(worst condition) and
also get a good-voice quality-VoIP.
Penuilis: Muhamad Ridwan, Azis
Wisnu Widhi Nugraha, Hesti Susilawati
Kode Jurnal: jptindustridd110160