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Network Requirements
Listed below are the requirements for a successful IPedge implementation.
LAN Requirements
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Network Assessment (Pathview and/or AppCritical or Similar)
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Network topology diagram
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Network Reliability (at the server level – not at the phone level): 99.999%
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POE for IP telephones is recommended
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Layer 3 voice prioritization strongly recommended
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Layer 3: DiffServ:Enabled
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Type:DSCP / DSCP for Voice: 46
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Layer 2 can also be supported per network requirements
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Layer 2: 802.1p/802.1q(VLAN)
802.1p/802.1q support requires networking equipment for IPedge server and is supported by the
IP 5000 series phones.
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88kbps (G.711 audio) in each direction per simultaneous call
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32kbps (G.729 audio) in each direction per simultaneous call
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Jitter: 10mS or less (+/- 5mSec)
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Less than 50ms latency
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Packet Loss: <0.1%.
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Full Duplex Ethernet on all ports
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Target MOS (Mean Opinion Score) is 4.0
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Recommend network monitoring with a tool such as What's up Gold.
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For SIP trunking a SIP application layer gateway is required in the firewall
VoIP Requirements for Remote Users
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Network Reliability – on the link that's in the customer's control 99.99%
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Layer 3 voice prioritization recommended
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Layer 3: DiffServ:Enabled / ToS Type:DSCP / DSCP for Voice: 46
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88kbps (G.711 audio) in each direction per simultaneous call
Note
Media traffic is Peer-to-Peer
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Less than 80 ms latency recommended
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Jitter: 20mS or less (+/- 10mSec)
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Packet Loss: < 1%.
Introducing Toshiba's IPedge EP Server
Network Requirements
17 of 19
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