Cisco Octal-Port DMT ATU-C Line Card Information Manual
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Cisco Octal-Port DMT ATU-C Line Card Information Manual

Cisco Octal-Port DMT ATU-C Line Card Information Manual

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Octal-Port DMT ATU-C Line Card
This feature module describes the Cisco IOS support for the octal-port DMT ATU-C (8xDMT) line card.
It includes information on new and modified commands.
This document includes the following sections:
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•
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Glossary, page 27
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Feature Overview

The 8xDMT line card provides higher port density for the Cisco 6015, Cisco 6160, and Cisco 6260. This
line card:
Supports eight ADSL modem connections per card.
•
Converts ADSL modulation from the line card into digital data streams to and from the NI-2 card.
•
•
Negotiates the line rate with the customer premises equipment (CPE) when it trains and bases the
rate on line quality and distance.
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Provides subscriber and port provisioning through DSL profiles.
Interoperates with certain CPE. For more detailed information, see the
•
section on page
Note
Allows single latency-Fast or interleaved path selection.
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Supports trellis encoding.
Supports bit swapping.
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4.
Check with a Cisco customer representative to verify CPE compatibility with
the 8xDMT.
"Supported Platforms"
Cisco IOS Release 12.1(6)DA
1

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Summary of Contents for Cisco Octal-Port DMT ATU-C Line Card

  • Page 1: Table Of Contents

    • Glossary, page 27 • Feature Overview The 8xDMT line card provides higher port density for the Cisco 6015, Cisco 6160, and Cisco 6260. This line card: Supports eight ADSL modem connections per card. • Converts ADSL modulation from the line card into digital data streams to and from the NI-2 card.
  • Page 2 Formerly, if a line trained below the configured minimum bit rate threshold, it would generate a minor alarm, but the DMT port remained active. The dmt minrate-blocking prevents DMT ports from training when bit rates fall below the configured minimum threshold specified in the dmt bitrate minimum command. Cisco IOS Release 12.1(6)DA...

  • Page 3: Related Documents

    Web at http://www.cisco.com/univercd/cc/td/doc/product/dsl_prod/ios_dsl/index.htm. In the ATM software product related documentation, look for information pertaining to the Cisco LightStream 1010, which uses the same software base as the NI-2 DSL systems. This documentation is available on the World Wide Web at http://www.cisco.com/univercd/cc/td/doc/product/atm/index.htm.

  • Page 4: Supported Platforms

    Cisco 6015 Cisco 6160 Cisco 6260 The 8xDMT is designed for use with the Cisco 6015, Cisco 6160, or Cisco 6260 chassis in one of the following configurations: • Cisco 6015, Cisco 6160, or Cisco 6260 with a POTS splitter chassis—Provisions one modem directly and is physically connected to one specific subscriber line through the POTS splitter chassis.

  • Page 5: Supported Standards, Mibs, And Rfcs

    ITU G.992.2. (G.lite) • ITU G.994.1. (G.hs) Standard MIBS To obtain lists of supported MIBs by platform and Cisco IOS release and to download MIB modules, go to the Cisco MIB web site on Cisco Connection Online (CCO) at http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml. •...

  • Page 6: Prerequisites

    After you have completed these steps, insert the 8xDMT line card to activate the card with your Tips preprovisioned configuration. Verifying the Preprovisioned Slot Use the show running-configuration command to verify that you preprovisioned the slot correctly. Cisco IOS Release 12.1(6)DA...
  • Page 7 DMT check bytes, and overhead framing parameters in your DSL profile: Caution Before migrating from interleave mode to fast path, determine whether the deployed CPEs offer support for the feature. The Cisco 600 series CPEs currently do not support fast path. Command Purpose Step 1 Enter DSL profile configuration mode.

  • Page 8: Troubleshooting Tips

    DSLAM(config-dsl-profile)# exit Troubleshooting Tips Cisco provides Cisco.com as a starting point for all technical assistance. Customers and partners can obtain documentation, troubleshooting tips, and sample configurations from online tools. For Cisco.com registered users, additional troubleshooting tools are available from the TAC website. To...

  • Page 9: Configuration Examples

    12 upstream 6 dmt margin downstream 12 upstream 6 dmt bitrate maximum fast downstream 3200 upstream 640 dmt bitrate maximum interleaved downstream 0 upstream 0 network-clock-select 1 system ip subnet-zero ip host-routing no ip finger Cisco IOS Release 12.1(6)DA...

  • Page 10: Command Reference

    Command Reference for Cisco DSLAMS with NI-2. For information on other Cisco IOS commands that can be used on the NI-2 DSL systems, see the Cisco ATM Switch Router Command Reference Guide.
  • Page 11 However, you can track the condition of DSL ports on which alarms are disabled, including conditions that ordinarily trigger alarms, using the command show dsl interface atm slot#/port#. You can suppress minimum bit rate alarms without disabling other alarms for the profile. Cisco IOS Release 12.1(6)DA...
  • Page 12 Display a specific profile, all ports to which the profile is currently attached, and those port settings. show facility-alarm status Display the current major and minor alarm status, if any, and display the configuration of the alarm thresholds. Cisco IOS Release 12.1(6)DA...
  • Page 13 The fast keyword was added. Usage Guidelines Only the alarm subsystem uses the minimum bit rate settings. Cisco IOS asserts an alarm if the line card trains at a rate below the configured minimum bit rate. However, no alarm occurs when you disable alarms.
  • Page 14 DSLAM(config)# dsl-profile default DSLAM(config-dsl-prof)# dmt bitrate maximum interleaved downstream 3200 upstream 640 Related Commands Command Description show dsl profile Display a specific profile, all ports to which the profile is currently attached, and those port settings. Cisco IOS Release 12.1(6)DA...
  • Page 15 Examples In this example, the command sets the interleaved FEC check-bytes for the default profile to 12 downstream and 6 upstream. DSLAM# configure terminal DSLAM(config)# dsl-profile default DSLAM(config-dsl-prof)# dmt check-bytes interleaved downstream 12 upstream 6 Cisco IOS Release 12.1(6)DA...
  • Page 16 Octal-Port DMT ATU-C Line Card dmt check-bytes Related Commands None. Cisco IOS Release 12.1(6)DA...
  • Page 17 In this example, the command sets the SNR margins of the default profile to 12 dB downstream and 6 dB upstream: DSLAM# configure terminal DSLAM(config)# dsl-profile default DSLAM(config-dsl-prof)# dmt margin downstream 12 upstream 6 Related Commands None. Cisco IOS Release 12.1(6)DA...
  • Page 18 Usage Guidelines To specify the bit rate below which a DMT port will not retrain, use the dmt bitrate minimum command. Examples The following example describes how to enable dmt minrate-blocking: configure terminal dsl-profile 8xDMT dmt minrate-blocking Cisco IOS Release 12.1(6)DA...
  • Page 19 You select the type of ADSL framing by choosing one of four modes: Mode 0—Full overhead framing with asynchronous bit-to-modem timing (an enabled • synchronization control mechanism). Mode 1—Full overhead framing with synchronous bit-to-modem timing (a disabled synchronization • control mechanism). Cisco IOS Release 12.1(6)DA...
  • Page 20 In this example, the command sets the overhead framing mode in the profile named 8xDMT. DSLAM# configure terminal DSLAM(config)# dsl-profile 8xDMT DSLAM(config-dsl-prof)# dmt overhead-framing mode2 Related Commands Command Description show dsl profile Display a specific profile, all ports to which the profile is currently attached, and those port settings. Cisco IOS Release 12.1(6)DA...
  • Page 21 Sets the upstream and downstream time intervals at which a DMT port is monitored for SNR margins. dmt rate-adaptation margin Sets the SNR values below which the DMT port retrains to a lower bit rate. Cisco IOS Release 12.1(6)DA...
  • Page 22 Remember, a downstream value of 10 can yield a monitoring interval between 1 minute to Note 2.5 minutes in length. upstream—10 • Command Modes DSL profile configuration Command History Release Modification IOS 12.1(6)DA This command was introduced. Cisco IOS Release 12.1(6)DA...
  • Page 23 10 upstream 20 Related Commands Command Description dmt rate-adaptation enable Turns on rate adaptation. dmt rate-adaptation margin Sets the SNR margins below which a DMT port retrains to a lower bit rate. Cisco IOS Release 12.1(6)DA...
  • Page 24 If line conditions improve, the line does not automatically drop and retrain to a higher bit rate. If the line conditions improve, the administrator must execute a shut then a no shut on the affected port to retrain to a higher bit rate. Cisco IOS Release 12.1(6)DA...
  • Page 25 The number of the slot you want to provision. The range is 1 to 38. The number of slots varies by chassis. The Cisco 6130 has Note 38 slots, the Cisco 6160 has 34 slots, and the Cisco 6260 has 32 slots. cardtype The line card type for which you want to configure the slot.
  • Page 26 Examples The command in this example provisions slot 30 for an 8xDMT line card. DSLAM# configure terminal DSLAM(config)# slot 30 ATUC-1-DMT8 Related Commands Command Description show hardware Display information about the physical modules in the chassis. Cisco IOS Release 12.1(6)DA...

  • Page 27: Glossary

    ADSL Transmission Unit—central office. ATU-C ADSL Transmission Unit—remote. ATU-R Cisco Broadband Operating System. Operating System that users access to configure and operate the CBOS Cisco products. Cisco Connection Online. The card cage (housing) where modules are placed.
  • Page 28 Octal-Port DMT ATU-C Line Card Glossary Cisco Distributed Defect Tracking System. DDTS See DS3. digital signal level 3 See DDTS. Distributed Defect Tracking System digital signal level 3. Framing specification used for transmitting digital signals at 44.736 Mbps on a T3 facility.
  • Page 29 No call setup or clearing procedures are needed. The path that network traffic takes from its source to its destination. The route a datagram may route follow can include many gateways and many physical networks. In the Internet, each datagram is routed separately. Cisco IOS Release 12.1(6)DA...
  • Page 30 A channel coding technique which provides forward error correction capability. trellis encoding Two insulated copper wires twisted together with the twists or lays varied in length to reduce potential twisted pair signal interference between the pairs. Cisco IOS Release 12.1(6)DA...
  • Page 31 Virtual path identifier. An 8-bit field in the header of an ATM cell. The VPI, together with the VCI, is used to identify the next destination of a cell as it passes through the network. See also VCI. Cisco IOS Release 12.1(6)DA...
  • Page 32 Octal-Port DMT ATU-C Line Card Glossary Cisco IOS Release 12.1(6)DA...

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