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Transport aspects 2

11.2.2.10 Inventory commands and responses

The inventory commands shall be used to determine the identification and capabilities of the FTU at the far
end. The inventory commands shown in Table 11-29 may be initiated by either FTU. The inventory
responses shall be as shown in Table 11-30. The first byte of all inventory commands and responses shall be
the assigned value for the inventory command type, as shown in Table 11-4. The second byte of the
inventory commands shall be as specified in Table 11-29. The second byte (ACK) and all following bytes of
the inventory responses shall be as specified in Table 11-30. The bytes shall be sent using the format
described in clause 11.2.2.1.

Table 11-29 – Inventory commands sent by the requesting FTU

Name Length (bytes) Byte Content
Identification request 2 2 0116 (Note)
Auxiliary inventory information request 2 2 0216 (Note)
Self-test results request 2 2 0316 (Note)

Initialization flags request 2 2 0416 (Note)
Initialization flags reset request 2 2 0516 (Note)
NOTE – All other values for byte2 are reserved by ITU-T.

Table 11-30 – Inventory responses sent by the responding FTU

Length
Name Byte Contents
(bytes)
ACK (identification) 58 2 8116 (Note)
3 to 10 Eight bytes of vendor ID.
11 to 26 Sixteen bytes of version number.
27 to 58 Thirty two bytes of serial number.
ACK (auxiliary inventory Variable 2 8216 (Note)
information)
3 Segment code (SC)
4 to 11 Eight bytes of vendor ID.

12 + Multiple bytes of auxiliary inventory
information.
Self-test results 6 2 8316 (Note)
3 to 6 Four bytes of self-test results.
Initialization flags 3 2 8416 (Note)

3 One byte with the value of the initialization
flags.
Initialization flags reset 3 2 8516 (Note)
3 One byte with the value of the initialization
flags before the reset.
NOTE – All other values for byte 2 are reserved by ITU-T.
Upon reception of one of the inventory commands, the FTU shall send the corresponding response. Any
function of either the requesting or the responding FTU shall not be affected by the command.

The vendor ID in the response identifies the system integrator and shall be formatted according to the
vendor ID of [ITU-T G.994.1]. In the context of this request, the system integrator usually refers to the
vendor of the smallest field-replaceable unit; thus, the vendor ID in the response may not be the same as
the vendor ID indicated during the ITU-T G.994.1 handshake phase of the initialization.

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