Figure 6-4 Voice And Data Network Implementation - NEC SL1100 Networking Manual

NEC SL1100
1. This description discusses voice and data. These terms are commonly used when describing QoS, although in the
case of VoIP, the voice is actually converted to IP and transmitted as data. Therefore, everything transmitted on a
Data Network is data, but logically we think of this as voice and data traffic.
Networking Manual
For most data applications this packet loss/delay is not critical. For example,
a delay of one to five seconds to transmit an email is imperceptible. When
VoIP is implemented, this loss/delay has a massive impact on the voice
quality. The resulting gaps in speech, distortion and delay are unacceptable
for voice traffic.
To avoid this problem, it is possible to prioritize the VoIP packets. The router
examines all packets received, determines the priority level of the packet, and
forwards it accordingly. The data
transmitted before the data. This can have a negative impact on the data
network if a lot of voice is transmitted.

Figure 6-4 Voice and Data Network Implementation

data network can be implemented.
Host A
100Mbps
Data Switch
Telephone
System A
Figure 6-4 Voice and Data Network Implementation
1
is assigned lower priority and the voice is
256Kbps
Private Circuit
(Leased Line)
Router Router
Issue 6.0
shows how a voice and
Host B
100Mbps
Data Switch
Telephone
System B
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