Alcatel-Lucent 1643 AMS Applications And Planning Manual page 257

SHDSL Overview
EOC addressing
The addressing scheme on the EOC can distinguish between the LTU, the NTU and up
to 8 SRUs per SHDSL span. At most two SRUs per LTU port are possible. During a
discovery phase, the number of SRUs and their addresses are established.
The detailed procedure for address discovery is described in clause 9.5.3 of ITU-T
Rec. G.991.2. Note that SRUs can have different addresses in each direction of
transmission.
Proprietary messages (EOC-ext.)
In addition to a subset of the G.991.2 (EOC) message set, a number of proprietary
messages for remote management of SRUs and NTUs is supported. The reason for this
proprietary addition is that the standard message set is only covering the SHDSL
aspects of the service, but not the interface towards the enduser, which can be E1,
ISDN-PRI, ISDN-LL or E/FE. In the following this additional message set ist called
EOC-ext.
When the LTU processes an EOC-ext. message, it is already validated as an EOC
message (correct CRC). The LTU only supports EOC-ext. commands and requests in
the transmit direction and confirmation and response messages in the receive direction.
EOC management communication
The communication from the LTU to an SRU or an NTU goes through three distinct
phases:
• Discovery phase:
This is the initial phase where the presence of the SHDSL devices (NTU and
SRUs) is detected. Additionally the EOC addresses are assigned and distributed.
• Inventory phase:
This is the secondary phase where the inventory data from a discovered SHDSL
device is collected. The LTU can determine the equipment type (SRU, NT2M or
NT10ETH). and whether an NTU is already connected to the LTU via another
SHDSL port.
• Operational phase:
This phase is entered after the completion of the inventory phase of an SHDSL
device. At the start of the operational phase and automatic configuration download
to the NTu or SRU is initiated in case the target was discovered on the port before.
Otherwise, the user has to provide a manual command to download the
configuration. After that normal alarm and performance monitoring starts. On user
request additional reconfiguration requests are possible.
Software download
Attached SHDSL devices that support the EOC-ext. message extension can be provided
with new software images remotely from the NE. In the system the image is stored in
a non-volatile memory. To initiate the software download a user command is needed.
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365-312-801R7.2
Issue 3, May 2007
Remote management and supervision of SHDSL devices
Alcatel-Lucent - Proprietary
See notice on first page
12-11