Page 840 - 5G Basics - Core Network Aspects

2 Transport aspects

Table 11-38 – PMD test parameter read responses sent by the responding FTU

Name Length (bytes) Byte Content Support

Single read 16 2 8116 (Note 2) Mandatory
ACK (Note 1)
3 to 16 Bytes for the test parameters arranged for
the single read format.
NACK 2 2 8016 (Note 2) Mandatory

Vector Variable 2 8616 (Note 2) Mandatory
block read (Note 1) 3 Segment code (SC)
ACK
4 + Bytes for the test parameters arranged for
the vector block read format.
NOTE 1 – Message length equals three bytes plus the length shown in Table 11-39.
NOTE 2 – All other values for byte 2 are reserved by the ITU-T.

Table 11-39 – PMD test parameter ID values and length of responses

Test parameter Length for Length for
ID Test parameter name single read vector block read Support
(Note 1) (bytes) (bytes)
0416 SNR per subcarrier N/A 2 + (stop subcarrier index − Mandatory
start subcarrier index + 1)
(Note 2)
0516 Downstream ALN per N/A 3 + (stop subcarrier group Mandatory
subcarrier group index − start subcarrier group
index + 1) (Note 4)
2316 SNRM 2 N/A Mandatory

2416 ATTNDR 4 N/A Mandatory
2516 Near-end ACTATP 2 N/A Mandatory
(Note 3)

2716 Far-end INP_act_shine 2 N/A Mandatory
2816 Far-end actual 2 N/A Mandatory
SNRM-RMC

2916 RXpower_dBm_DS 2 N/A Mandatory
Upon reception of a PMD test parameter read command, the responding FTU shall send the corresponding
response. If the format of the test parameter read command is incorrect, the FTU shall respond with the
negative acknowledgment (NACK). Any function of either the requesting or the responding FTU shall not be
affected.

The single read command shall be used to retrieve all parameters with ID values ≥ 2316. In response to a
single read command, the values for the test parameters (one value per parameter) shall be transferred in
numerically increasing order of the parameter ID shown in Table 11-39. The format of the bytes for each
parameter shall be as specified in clause 11.4.1. Values formatted as multiple bytes shall be mapped to the
response in order of most significant to least significant byte. Bytes indicated as reserved shall be set to
ZERO in the transmitter and ignored by the receiver.

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