User guide

Glossary
106 1/1551-HSC 901 35/3 Uen C 2005-12-02
Re. the CPE equipment, a DHCP server
shall be available somewhere in the ISP-
network to provide IP addresses for the
IADs.
Re. the Access Domain/Domain subnet,
there shall be access to an Access Domain
DHCP server to provide IP-addresses for
the Elements in the Access Domain/Domain
subnet server.
DHCP server
Dynamic Host Configuration Protocol
server. A configuration server, capable of
configuring hosts with a variety of
information required for their operation. In
EDA there is one or more DHCP servers for
each Access Domain.
Differentiated services
A priority based approach to providing
transport services with distinct QoS in
packet based networks. The differentiated
services approach relies on each network
element to invoke the network QoS policy
hop-by-hop.
Domain Server
A Domain Server is a server computer that
handles part of the network managed by
PEM. The Domain Server will host an NNM
Collection Station and a Domain Service
(which links the application software to
NNM), and probably also a DHCP Server
and a Domain File Server.The DHCP
Server and the Domain File Server can be
installed on separate server computers.
Domain Service
Also referred to as PEM Domain Service
has two functions:
Interface between NNM and the other EDA
specific elements and interface between the
EDA servers and the IP DSLAMs (a
protocol converter between CORBA and
SNMP).
There are two types of Domain Services:
PEM Management Domain Service, and
PEM Access Domain Service. The two
types are identical; the name only refers to
their placement in the EDA system.
DSL
Refers to Digital Subscriber Lines
DSL technologies use sophisticated
modulation schemes to pack data onto
copper wires. They are sometimes referred
to as last-mile technologies because they
are used only for connections from a
telephone switch to a home or office, not
between switches.
DSLAM
Digital Subscriber Line Access Multiplexer
DTMF
Dual Tone Multiple Frequency
Dual Latency
An ADSL option, enabling establishment of
two separate physical channels with
different characteristics on an ADSL line.
The characteristics in question are bit error
rate and delay, which are traded off against
each other. Optimizing one deteriorates the
other.
EAN
Ethernet Access Node
ECN
Ethernet Controller Node
EDA Core System
Mandatory parts of an EDA access system.
EDF
Ethernet DSL Filter
Edge Node
The node that connects the switched
Ethernet of the EDA with the backbone
network (can be either data network or
telephony network).