Lucent Technologies 7820-0802-003 Configuring data transfer rates, Parameter Cards it applies to

Configuring DSL Connections (DSLTNT)

Configuring data transfer rates

Configuring data transfer rates

You can configure DSL upstream and downstream rates in the line profiles for each card, and in Connection or RADIUS profiles. The data transfer rates in the line profiles apply to the port. The data rate limits in Connection or RADIUS profiles apply only to sessions using that particular profile.

Configuring session rate limits enables you allocate portions of a DSL connection’s bandwidth to particular users. For information, see “Configuring per-session data transfer rates” on page 17-8.

Table 17-1describes the parameters that determine the data transfer rates on the DSLTNT. For detailed information about these parameters, see the APX 8000/MAX TNT/DSLTNT Reference.

Table 17-1.DSL data rate configuration parameters

Parameter	Cards it applies to
SDSL line profile
Data-Rate-Mode	SDSL
Max-Rate	24 port SDSL only
ADSL-CAP or ADSL-DMT line profile
Data-Rate-Mode	ADSL-CAP, ADSL-DMT
Max-Up-Stream-Rate	ADSL-CAP, ADSL-DMT
Max-Down-Stream-Rate	ADSL-CAP, ADSL-DMT
Connection profile > Session-Options
Ses-ADSL-Dmt-Up-Rate	ADSL-DMT
Ses-ADSL-Dmt-Down-Rate	ADSL-DMT
Ses-ADSL-Cap-Up-Rate	ADSL-CAP
Ses-ADSL-Cap-Down-Rate	ADSL-CAP
Ses-Rate-Mode	ADSL-CAP, ADSL-DMT, SDSL
Ses-Rate-Type	ADSL-CAP, ADSL-DMT, SDSL
Ses-SDSL-Rate	SDSL
Rx-Data-Rate-Limit	SDSL
Tx-Data-Rate-Limit	SDSL

Configuring data transfer rates for ADSL lines

The Max-Down-Stream-Rate parameter in the ADSL-DMT and ADSL-CAP line profiles specifies the maximum downstream rate that the transceiver supports. If loop quality is poor, the transceiver chooses the lower rates, and good loop quality causes the transceiver to choose the higher rates. If the loop quality is very poor, the transceiver will not train at all, and will be unable to connect to the remote side. In that case, you must specify a lower maximum downstream rate, because the transceiver does not cross rate boundaries.

17-6 APX 8000/MAX TNT/DSLTNT Physical Interface Configuration Guide