Panasonic KX-TDA0480, Руководство по установке

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Appendices
150 Installation Manual
Internet, Intranet, and Virtual Private Networks (VPN)
Managed Networks (Intranet, Leased Lines, VPN, etc.) provide better quality of service as
compared to unmanaged networks (e.g., the Internet).
When implementing a network of the KX-TDA0480, care must be taken when assessing
bandwidth requirements. The KX-TDA0480 uses 12K per port when in use. Serialisation
delays to the WAN are lower when higher bandwidths are used.
When using the Internet/VPN, the Internet Service Provider plays an important role in reducing
the variable delay in the WAN. A regional or national ISP will usually have better connectivity
with the backbone and will be able to guarantee greater service reliability than a local city ISP.
When using VPN facilities, delays may be introduced due to the additional processing time
required for encryption processing.