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Transport aspects 2

Table 11-50 – DRR configuration responses (sent by the FTU-R)

Name Length (bytes) Byte Content

DRR.confirm 3 2 8116 (Note 1)
3 One byte for ACK (0016) or NACK (FF16)
DRR.config. Variable 2 8216 (Note 1)
confirm
3+ DRR data as received from the L2+ function at the FTU-R
(see Table 8-3). The format of the DRR data field is defined
in Table Y-2.
NOTE 1 – All other values for byte 2 are reserved by ITU-T.

11.2.2.18 Fast startup training sequence parameters command and response
The command is to configure the fast startup training sequence parameters at the FTU-R. The command
shall only be sent by the FTU-O. The FTU-R shall acknowledge the command by sending a response.

The first byte of either the command or a response shall be the assigned value for Fast startup training
sequence parameters command type, as shown in Table 11-5 (normal priority command). The remaining
bytes shall be as shown in Table 11-51 and Table 11-52 for command and response, respectively.

Table 11-51 – Training sequence parameters command (sent by the FTU-O)

Length
Name Byte Content
(bytes)
Fast startup training 10 2 0116 (Note)
sequence 3 Number of DS SOC data symbols (sds).
parameters
The value shall be mapped to the six LSBs of this byte as
defined in Table 12-9.
4 Number of SOC symbol repetitions (Rs).
The value shall be mapped to the five LSBs of this byte as
defined in Table 12-10.
5 to 10 Length and elements of IDS
The six bytes are represented as a single 48-bit field. The 42
LSBs shall be used for IDS mapping as defined in Table 12-10.
The LSB of the field corresponds to bit 0 of byte 5.
NOTE – All other values for byte 2 are reserved by ITU-T.
The FTU-R shall apply these parameters upon transition from the R-SHOWTIME state to the R-INIT/TRAIN
state (fast retrain), as described in Figure 12-5.
The FTU-R shall acknowledge the reception of the command, as shown in Table 11-52. The FTU-R may only
reject (NACK) the command if one or more of the requested parameters is invalid.

Table 11-52 – Training sequence parameter responses (sent by the FTU-R)

Name Length (bytes) Byte Content
ACK 2 2 8016 (Note)
NACK 2 2 8116 (Note)

NOTE – All other values for byte 2 are reserved by ITU-T.

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