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Configuring RADSL Cards

This chapter covers the following topics:
Introduction
Installing the RADSL card
Configuring the maximum downstream rate
Sample RADSL configuration

For information about installing the RADSL voice splitter, see Appendix B, "Configuring the RADSL Voice Splitter. "

Introduction

Note: The MAX TNT must have software version 1.3Ai2 or later to support ADSL. Refer to the MAX TNT release notes for information about obtaining and loading MAX TNT software.

Rate Adaptive Digital Subscriber Line (RADSL) Carrierless Amplitude Phase (CAP) is part of a broad range of Ascend MultiDSL offerings that let you implement DSL technologies immediately. RADSL supports high-bandwidth applications such as remote access, Internet or intranet access and telecommuting. RADSL supports the following asymmetric transfer rates:

Upstream rate

Downstream rate

Distance
544Kbps

 640Kbps

 17,000 feet (5.18 km)

1.088Mbps

 2.560Mbps

12,000 feet (3.66 km)

1.088Mbps

 7.168Mbps

 10,000 feet (3.05 km)

Rate Adaptive Digital Subscriber Line (RADSL)

RADSL allows the MAX TNT to detect the noise level on the line and automatically adjust the data transfer rate for optimum performance.

Installing the RADSL card

The RADSL card is illustrated in Figure 14-1.

Figure 14-1. MAX TNT RADSL card

You install RADSL cards in the same way you install other MAX TNT slot cards. For instructions, see Installing a slot card.

Configuring the maximum downstream rate

The Max-Down-Stream-Rate parameter specifies the maximum down-stream rates 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, the administrator must specify a lower maximum down-stream rate, because the transceiver does not cross rate boundaries.

For example, if the transceiver is configured for 7160000bps and the loop quality is so poor that the transceiver will not connect to the remote side, the transceiver does not automatically adjust the down-rate into the 5120000bps range. The administrator needs to configure the Max-Down-Stream-Rate to the lower rate.

Note: You can set the maximum down-stream rate with SNMP by writing the DownRate object in the AdslCapLineStatusEntry MIB.

Sample RADSL configuration

In Figure 14-2, a DSLPipe connects to a MAX TNT RADSL card. This connection provides data transfer rates of up to 7.168 Mbps downstream and 1.088 Mbps upstream over a single pair of copper wires using Frame Relay as the transport protocol.

Figure 14-2. Sample RADSL setup

Configuring an RADSL connection requires the following general steps:

Configuring the ADSL profile

 To configure the ADSL profile:

  1. Read in the ADSL profile. For example, if the RADSL card is installed in slot 11 of shelf 1 and the remote DSLPipe is connected to port 1:

  2. List the profile:

  3. Enable the port:

  4. List the contents of the Line-Config profile:

  5. Assign this port to a nailed group:

    This nailed group points to the Frame Relay profile you will create later. The nailed group must be unique for each active WAN interface.

  6. If required, set the maximum down stream rate:

  7. Move up to the top-level profile:

  8. Write the profile:

Configuring the Connection profile

 To configure the Connection profile:

  1. Create a new Connection profile:

  2. List the profile:

  3. Enable the profile:

  4. Set the encapsulation type to Frame Relay:

  5. List the IP options submenu:

  6. Set the IP address of the DSLPipe connecting to the MAX TNT:

  7. Set the IP address of the MAX TNT RADSL port.

  8. Move up to the higher-level profile:

  9. List the Frame Relay options submenu:

  10. Link this Connection profile to the Frame Relay profile you will create in the next section:

  11. Set the DLCI to the same value as the DSLPipe:

  12. Write the profile:

Configuring the Frame Relay profile

 To configure the Frame Relay profile:

  1. Create a new Connection profile:

  2. List the profile:

  3. Enable the profile:

  4. Assign the Frame Relay profile to a nailed-up group:

    This must be the same as the RADSL nailed group number you configured in the ADSL profile. The nailed group must be unique for each active WAN interface.

  5. Write the profile:

Configuring the DSLPipe

 To configure the DSLPipe:

  1. From the Main Edit menu, select Configure.

  2. Specify the following values:

  3. From the Main Edit menu, select Ethernet > Connections > COE-11-1 Connection profile.

  4. Specify the following values:

  5. Open the Encaps Options submenu.

  6. Specify the following values:

  7. Exit the Connection profile and save your changes. Next, set up the Frame Relay profile.

  8. Open the Ethernet > Frame Relay > Frame Relay profile.

  9. Specify the following values:

  10. Exit the Frame Relay profile and save your changes.

Sample RADSL PPP connection

In Figure 14-3, a DSLPipe connects to a MAX TNT RADSL card over a PPP connection. The RADSL card is in slot 7 and the DSLPipe is connected to port 3 of the RADSL card. The DSLPipe IP address is 10.10.73.1/24. The MAX TNT IP address is 104.178.115.163/24.

Figure 14-3. Sample RADSL PPP connection

Configuring the ADSL profile

To configure the ADSL profile in this example:

  1. Read in the ADSL profile:

  2. List the profile:

  3. Enable the port:

  4. List the contents of the line config profile:

  5. Assign this port to a nailed group:

    This nailed group points to the Connection profile you will create later. The nailed group must be unique for each active WAN interface.

  6. Specify the maximum downstream rate:

  7. Write the profile:

Configuring the Connection profile

 To configure the Connection profile in this example:

  1. Create a new Connection profile:

  2. List the profile:

  3. Enable the profile:

  4. Set the encapsulation type to PPP:

  5. List the IP options submenu:

  6. Set the IP address of the DSLPipe connecting to the MAX TNT:

  7. Verify that IP routing is enabled (the default) for this Connection profile:

  8. Verify that VJ header prediction is not enabled (the default) for this Connection profile:

  9. List the PPP options submenu:

  10. Specify the authentication mode the MAX TNT requests for the outgoing call:

  11. Specify the password the MAX TNT sends to the DSLPipe:

  12. Specify the password the MAX TNT expects to receive from the DSLPipe:

  13. Verify that the PPP address and protocol field compression is not enabled for this Connection profile (the default):

  14. List the Telco Options submenu:

  15. Specify the Call Type:

  16. Specify the nailed group to use for this Connection profile:

  17. Write the profile:

Configuring the DSLPipe

 To configure the DSLPipe in this example:

  1. From the Main Edit menu, select Configure.

  2. Specify the following values:

  3. From the Main Edit menu, select Ethernet >Connections > cala-23.

  4. Specify the following values:

  5. Open the Encaps Options submenu.

  6. Specify the following values:

  7. Open the Telco Options submenu.

  8. Set Call Type=Nailed.

  9. Exit the Connection profile and save your changes.


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