ZyXEL Communications PLA-470 V2 - V3.0.5 Guía de instalación descargar pdf (Pagina 324)

The network engineering study aims at identifying the following characteristics

in particular:

•

Structure of the buildings (size of the rooms, raceway possibilities, materials

of the walls for radio transmission, and so forth);

•

Existing networks (private telephone networks connecting several buildings

of a site, cable TV networks, and so forth);

•

Electrical network mapping and position of the circuit breaker panel;

•

Expected network performance for applications (transit time, latency, jitter,

and so forth);

Optimizing Network Architectures 305

Table 13.2 Comparison Between the Various Network Technologies

NETWORK

TECHNOLOGY

COST DISADVANTAGES ADVANTAGES

Ethernet cable

(CAT5 100baseT)

High –Raceway

–Cable cost

–Guaranteed QoS

–Increased security (RJ-45 connector

access control, filtering)

–Guaranteed throughput

–Power supply by PoE

Wi-Fi

(IEEE 802.11g)

Average –Radio coverage study

–WPA and AES encryption

implementation

–Required RADIUS server

–Non guaranteed QoS

–Network open-endedness

–Mobility and handover

–ToIP on Wi-Fi

–Hybrid network with wired backbone

Cable TV High if

raceway

–Raceway

–Potentially shared medium

requiring authentication

–Possibility to use existing cables

–Guaranteed QoS

–Difficult access to physical medium

Optical fiber

(plastic fiber)

High –Raceway

–Cost of active devices

–Very high throughput

–Noise immunity

–Ideal for wired backbone

–Difficult access to physical medium

HomePlug Turbo

PLC

Average –Requires site and electrical

network engineering study

–Requires good knowledge of

the electrical network

–Difficult access for some

device locations

–High useful throughput

–Easy configuration

–Network open-endedness

–Possible temporary network

–Medium security

–Several VLAN on same electrical

network

HomePlug AV PLC –Requires good knowledge

–of the electrical hazards

–Useful throughput for HD video

applications

–Guaranteed QoS

–Coexistence with other HomePlug

1.0 and Turbo devices

–Compliance with electromagnetic

immunities

–Hybrid PLC/Wi-Fi networks

Telephone cable High if

raceway

–Public telephone cable

belonging to France

Télécom

–Use of existing cables

–High and guaranteed throughput

–Guaranteed QoS

–Physical medium security

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