The Modulation Profile Numbering Scheme - Motorola BSR 2000 Configuration And Management Manual

Release 1.0
DOCSIS 1.0 and 1.1 cable modems use IUCs 5 and 6 for data transmission while
DOCSIS 2.0 cable modems use IUCs 9, 10, and 11 for data transmission. IUCs 9, 10,
and 11 may use higher modulation orders not supported by DOCSIS 1.0 and 1.1. IUC
11 was added for unsolicited grant service (UGS) flows.
Note: Motorola does not recommend modification of modulation profile
parameters without a thorough understanding of modulation changes and
DOCSIS interface specifications. Modulation profile parameters will affect the
physical layer and may cause disruption or degradation of services.

The Modulation Profile Numbering Scheme

With Release 4.1.0, the number of modulation profiles supported by the BSR has been
increased from 16 to 600. The number of pre-defined modulation profiles supported
has also been increased and a user is allowed to modify a pre-defined modulation
profile. There are 23 default modulation profiles assigned to the TDMA (1-4),
MTDMA (101-116), ATDMA (201-205), and SCDMA (301-310) channel types. The
numbering ranges for pre-defined modulation profiles for each channel type are as
follows:
526360-001-00 Rev. B
IUC 1 Request Burst - opportunity for cable modems to transmit bandwidth
requests
IUC 3 Initial Maintenance - opportunity for cable modems to join the network by
sending an initial ranging request
IUC 4 Station Maintenance -cable modem periodic ranging
IUC 5 Short Grant Burst - short data burst
IUC 6 Long Grant Burst - long data burst
IUC 9 Advanced PHY Short Data Grant - advanced short data burst
IUC 10 Advanced PHY Long Data Grant - advanced long data burst
IUC 11 Unsolicited Grant Service - advanced unsolicited grant service
1-100 = TDMA
101-200 = MTDMA
201-300 = ATDMA
301-400 = SCDMA
MGBI
Configuring the CMTS
6-61