Zhone EtherXtend 3300 Series, Руководство пользователя

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Ethernet services
EtherXtend User’s Guide
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Frame Relay migration to E-LAN services
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T1/E1 replacement with E-Line services, including internet access,
wireless backhaul, voice access, and wholesale services.
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Transparent LAN service (TLS)
EFM over copper technology supports a wide range of voice, data, and video
services and applications. Many applications are extensions of those now
supported by T1/E1 and Frame Relay services. However, they are more
responsive to new demands by customers by providing much higher data
rates.
Ethernet services
The Metro Ethernet Forum (MEF) has helped to define standards for Ethernet
services. These standards helped to establish the user network interface and
Ethernet virtual connection for two principal services: E-Line and E-LAN.
E-Line services include point-to-point Ethernet connections using Layer 2
VLAN infrastructure with two types of user network interface (UNI) access:
802.1Q-in-802.1Q (QinQ) and dot1Q encapsulation. These services are also
known as Ethernet Relay Service (ERS) and Ethernet Wire Service (EWS).
E-LAN services provide multipoint-to-multipoint services using virtual
private LAN services (VPLS) or simply layer 2 VLAN core.
Carrier Ethernet has developed a series of extensions to standard Ethernet that
provide improved performance on the Internet.