Nera WILINK I System Manual page 139

Chapter 4 - Operation and Administration
Aggregation: Several Services in the Wireless Domain may be aggregated into
a single Virtual Private Link (VPL) in the backbone domain.
Priority Marking: Ethernet frames transmitted to the backbone may be
marked with a configurable priority (DSCP or IEEE 802.1p), enabling the
upstream network to handle the traffic accordingly.
Auto-configuration: The Ethernet Addresses of the Subscribers' PCs are
automatically learnt just as in a standard Bridge. For each Ethernet Address
it also learns the VLAN behind the SU it belongs to.
Currently, the following Service types are supported:
L2 (layer 2) Data Service
PPPoE Data Service
Voice Service
4.10.1.2 Service Types
4.10.1.2.1 L2 Service
L2 (Layer 2) service transports Layer 2 (Ethernet) frames between the subscriber's
site and the Network Resource located behind the provider's backbone and/or
between the subscriber's sites. It is assumed that the backbone either supports
encapsulation of the Layer 2 frames (e.g. over ATM) or routes the frames
according to the applicable Layer 3 protocol, which could be different from IP. The
Network Resource is assumed to be a corporate network.
NOTE
An L2 Service supports also DRAP-based Voice Service, as described in the next page.
4.10.1.2.2 PPPoE Service
PPPoE (Point-to-Point Protocol over Ethernet) Access service provides connectivity
between a PPPoE enabled devices at the subscriber's site and a PPPoE aware
Access Concentrator behind the Base Station. The frames are forwarded only
between the Subscribers' PCs and the PPPoE Access Concentrator. Frames that
are not PPPoE Ethertype are discarded. In the uplink, frames are never relayed
but only forwarded to the Access Concentrator. In the downlink, broadcasts are
allowed only in cases of unknown addresses.
4.10.1.2.3 Voice Service
The Voice over IP (VoIP) service provides telephony services through an external
Voice Gateway connected to the Subscriber Unit's data port. The VoIP service is
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WILINK I MODULAR BASE STATION SYSTEM MANUAL