Ericsson EDN312 Guia do Utilizador descarregar pdf (Página 18)

Function Description

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

line rate requires the CPE modems to support S=½. The higher line rate is

obtained by configuring the maximum interleave delay greater than 0

(which enables the ATUC S=½). The minimum and maximum bit rates

must be set for the line correspondingly. Tests have shown that a maximum

ADSL line rate of 11-13 Mbps should be attainable.

The ADSL2 transmission modes supports only interleaved path. Therefore

the IP DSLAM cannot directly be configured to fast latency. However, if the

transmission mode is selected to ADSL (1) and interleaved delay is

configured to zero, the IP DSLAM will use the fast path. For a detailed

description of how to configure the line please see the PEM User's Guide.

Furthermore the IP DSLAM supports the ADSL2+ standard, capable of

downstream line rates of up to 24480 kbps (ADSL2+ standard) and

approximately 29 Mbps (when connected to a CPE Modem based on a

Broadcom ADSL2+ chipset).

3.2.1 Redundancy and Aggregation Options (EDN312x only)

The EDN312x versions (EDN312xp, EDN312xi, EDN312xe and

EDN312xa) have two uplink ports, which facilitate power supply

redundancy, and either link aggregation (IEEE 802.1ad) or link redundancy

(by utilizing RSTP-like function). Figure 7 on page 15 illustrates these

possibilities.

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Ericsson EDN312 Guia do Utilizador Página 18