Voice Over IP
Author: johnnyVoice Over IP - the reasons that we have all heard!
§Perception §It is cheaper to run just one network. §It is easier to integrate advanced technology when your phone is on the network (CTI). §If you don't do it someone else will. §Reality §Convergence will occur some day so it is important that we build the required relationships now.
TCP/IP implementations
§Departmental VOIP PBX §Centralized VOIP PBX §Road warriors §VOIP trunking §Intranet §Internet
VOIP decisions
§Power for VOIP phones §E-911 mapping
Which Codec to use
Parameters the impact VOIP- How much is to much? §Packet loss §Latency §Jitter packet loss packet loss is defined as loss in transceiving operation that means when we send some data, it should reach the destination.in that time data are transfer in form of packet if we loss to receive any data which is in form of packet is called as packet loss. Latency latency is nothing but a amount of frames reached its destination with any loss or not. jitter jitter is nothing but amount of noise or unwant frames which has added to transmitting frames and able retrieve its data it is also called as jitter tolerance
QoS issues
§QoS has been added to the H.245 OLC packets to allow endpoints to set QoS parameters for the media streams, including RSVP parameters. H.323 only communicates QoS information between H.323 devices. Actual reservation and control of resources is outside the scope of the standard. QoS options §Prioritize by Application §Prioritize by Address - many applications §Create separate VLANs
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