Ericsson EDN312 Guia do Utilizador descarregar pdf (Página 33)

Function Description

4/1553-HSC 901 101/2 Uen B 2009-02-27

Access Provider Main

Time

Synchronization

Server

Access

Domain1

Time

Synchronization

Server

DSLAM

Access

Domain2

DSLAM

Figure 16 Time Synchronization Scenarios

3.3 EXN104

The EXN104 has a single RJ-45 port, which supports 100BASE-TX on CAT

5 cables and conforms to IEEE 802.3u. On the MDF interface the EXN104

supports four 120Ω E1 ports (2048 kbps), which conforms to ITU-T G.703.

The ports can also be connected to T1 lines, but this will require changing

the basic configuration as explained in section 5.2.2 on page 36.

The EXN104 is powered through the Ethernet port (PoE, similar to the

IP DSLAM). It is fully manageable using SNMP from PEM. The EXN104

can operate autonomously because firmware and configuration are stored

in flash.

All software and firmware can be upgraded through the FE and E1 ports

(thus enabling upgrade of nodes placed at both the central and the remote

site). Software and firmware upgrades are done from PEM.

3.4 EPN102

The EPN102 is capable of distributing power (-48 V DC) to two EDA nodes.

It is intended to be used as a power distribution unit for one IP DSLAM and

one EXN104 (Ethernet to E1 converter) in a remote site. The EPN102 is

mounted in a 10-line KRONE LSA block. Fast Ethernet is accessed through

two shielded RJ45 connectors that are crossed connected internally in the

EPN124. The EPN102 is grounded through the LSA block. The EPN102 is

unmanaged.

The EPN102 provides the following external interfaces:

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Ericsson EDN312 Guia do Utilizador Página 33