Panasonic KX-NS1000 Installation Manual page 359

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Resource sharing allows users to interact as if they were all connected to one PBX, which eliminates the
need to manage information such as PBX access codes.
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All units in a One-look network can be programmed from one location.
Note
The MASTER indicator LED indicates whether the unit is configured as a Master unit or Slave unit. For
details, refer to "LED Indications".
Conditions
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The sites that will be included in a One-look network must be connected over a private IP network before
setting up the One-look network.
Bandwidth Requirements
When implementing a One-look network, you must ensure that the IP network has enough bandwidth to support
both VoIP communication and One-look network signalling between PBXs. If the amount of bandwidth required
for VoIP communications and signalling is more than the network can accommodate, speech quality will
degrade. In addition, there may be an adverse effect on the performance of other applications (e.g., e-mail or
Web applications) that use the same network. Therefore, care must be taken when assessing bandwidth
requirements.
Inform your network administrator of the required bandwidth, and make sure that the network can support VoIP
communications and signalling even under conditions of maximum network traffic.
Required Bandwidth per Call
The required bandwidth depends on the following factors:
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The maximum number of simultaneous calls
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Packet sending interval
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Type of codec used
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Telephone type
Keep in mind the following points about the types of codecs and packet sending intervals, in terms of speech
quality:
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The speech quality of the codecs varies as follows: (High) G.722, G.711, G.729A (Low)
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The shorter the packet sending interval, the higher the speech quality.
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The higher the speech quality an IP telephone provides, the more bandwidth it requires.
When the preferred codec of each party differs, the call will be established using the lower quality codec.
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For example, if the caller prefers G.711 while the called party prefers G.729A, the call will be established using
G.729A.
8.4.1 One-look Network
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Installation Manual 359