Alcatel-Lucent 1643 AMS - Page 365

Applications
There are two application possibilities for the SHDSL feature:
• End-user access for E1 via a E1 NTU (NT2M modem)
• End-user access for Ethernet using a 10Base-T or a 100-Base-TX interface via an
Ethernet NTU (NT10ETH modem). Each NT10ETH modem has 1 or 2 Ethernet
ports towards the end-user
The 1643 AM and 1643 AMS has to be equipped with an X12SHDSL option card and
is then operating as LTU (Line Termination unit). All ports of the X12SHDSL option
card operate either in the E1/SHDSL mode or in the TU12/SHDSL mode.
An E1 modem provides one E1 user interface and one single SHDSL link. This means
a one-to-one correspondence between an LTU SHDSL port, the NT2M, and the E1
end-user interface.
An NT10ETH modem has two 10/100BASE-T(X) interfaces and can have one to four
parallel SHDSL links, that are all connected to the same X12SHDSL option card.
Each SHDSL link can have up to two SHDSL Regenerator Units (SRUs) depending on
the span connected to the LTU port. Each SRU supports one SHDSL link.
Remote management of SHDSL devices
The LTU maintains an information database of all attached NTUs and SRUs for the
purpose of configuration, performance, and fault information retrieval or control by
network management. All elements attached to an SHDSL span have to respond to
queries made to them from other elements. The database in the LTU is considered the
“master database”. Conflicts between the entities in the SHDSL span are resolved in
favour of the LTU. For 1643 AM and 1643 AMS only communication initiated by the
LTU is supported.
The alarm status of the SHDSL devices (NTU and SRUs) that are attached to an
SHDSL port on the LTU is polled by the LTu in regular intervals. Polling is realized
by means of EOC messages or by a combination of EOC and EOC-ext. messages.
NTU support
The following sections describe Ethernet NTU support features for SHDSL
configurations.
Cross-connection
matrix
External interface
(port)
Traffic provisioning SHDSL feature
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365-312-807R7.2
Issue 4, May 2007
Alcatel-Lucent - Proprietary
See notice on first page
8-13