ADSL Line Profile Configuration ----adsl channel-profile add(rfc4706)
adsl channel-profile add(rfc4706) adsl channel-profile add(rfc4706)
This command is used to add an ADSL2+ channel profile. When existing ADSL2+ channel profiles cannot meet the line activation requirements, you can run the command to add a new ADSL2+ channel profile. After that, the new ADSL2+ channel profile can be bound with an ADSL2+ line profile to be an ADSL2+ line template that is used to activate ports.
adsl channel-profile add [ profile-index ]
Indicates the ADSL2+ channel profile number.
When creating an ADSL2+ channel profile, you can specify a profile number or not. If you do not specify it, the system automatically allocates the smallest idle number.
The system has a default ADSL2+ channel profile. The profile number is 1. Parameters in the default profile are the data for your reference. In actual applications, you can add new profiles according to actual line conditions.
Numeral type. Range: 2-128.
Global config mode, ADSL mode, MA5683T, MA5680T, MA5608T
Run the config command to enter global config mode, and then run the interface adsl command to enter ADSL mode.
An ADSL2+ channel profile provides a series of parameters: the minimum impulse noise protection, the interleave delay parameters, the rate parameters and the rate threshold parameters. When a port is activated, the ATU-R negotiates with the ATU-C based on the parameters in the channel profile, so as to determine whether the connection can be set up between them under the existing conditions.
An ADSL2+ channel can be a fast or interleave channel.
When configuring an ADSL2+ channel profile, pay attention to the following points:
In an interleave channel, bit streams, after they are coded by FEC, are sent to interleaved register to be interleaved and then sent to lines. On the other side of the line, bit streams are de-interleaved correspondingly. In interleave channel mode, the greater the interleave depth, the stronger the error correction capability, but the larger the delay.
In a fast channel, bit streams, after they are coded by FEC, are sent to lines directly without interleave processing. In fast channel mode, the delay is smaller but the error correction capability is weak.
The minimum impulse noise protection (INP) is related to the interleave delay. The INP value is meaningless in fast channel mode. When you configure INP, the system does not judge the restriction between the INP and the interleave delay or other parameters. The board adapts INP automatically and the line activation is assured with preference.
When the adaptation mode for the upstream or downstream transmission rate is fixed, the maximum activation rate must be the same as the minimum rate in the same direction. When the adaptation mode is not fixed, the maximum rate must be larger than the minimum rate.
The minimum rate must be smaller than or equal to the minimum reserved rate. The minimum reserved rate must be smaller than or equal to the maximum rate.
The minimum downstream impulse noise protection is SingleSymbol.
The minimum upstream impulse noise protection is TwoSymbols.
The maximum downstream interleave delay is 40.
The maximum upstream interleave delay is 50.
The minimum downstream transmission rate is 100 kbit/s.
The minimum downstream reserved transmission rate is 500 kbit/s.
The maximum downstream transmission rate is 1000 kbit/s.
The minimum upstream transmission rate is 200 kbit/s.
The minimum upstream reserved transmission rate is 300 kbit/s.
The maximum upstream transmission rate is 400 kbit/s.
The downstream rate threshold downshift is 100 kbit/s.
The downstream rate threshold upshift is 200 kbit/s.
The upstream rate threshold downshift is 300 kbit/s.
The upstream rate threshold upshift is 400 kbit/s.
To add ADSL2+ channel profile 2, do as follows:
huawei(config)#adsl channel-profile add { <cr>|profile-index<U><2,128> }:2 Command: adsl channel-profile add 2 Start adding profile Press 'Q' to quit the current configuration and new configuration will be neglected > Do you want to name the profile (y/n) [n]: > Will you set the minimum impulse noise protection? (y/n) [n]:y > Minimum impulse noise protection downstream: > 1-noProtection 2-halfSymbol 3-singleSymbol 4-twoSymbols > 5-threeSymbols 6-fourSymbols 7-fiveSymbols 8-sixSymbols > 9-sevenSymbols 10-eightSymbols 11-nineSymbols 12-tenSymbols > 13-elevenSymbols 14-twelveSymbols 15-thirteenSymbols 16-fourteenSymbols > 17-fifteenSymbols 18-sixteenSymbols > Please select (1~18) [2]:3 > Minimum impulse noise protection upstream: > 1-noProtection 2-halfSymbol 3-singleSymbol 4-twoSymbols > 5-threeSymbols 6-fourSymbols 7-fiveSymbols 8-sixSymbols > 9-sevenSymbols 10-eightSymbols 11-nineSymbols 12-tenSymbols > 13-elevenSymbols 14-twelveSymbols 15-thirteenSymbols 16-fourteenSymbols > 17-fifteenSymbols 18-sixteenSymbols > Please select (1~18) [2]:4 > Will you set interleaving delay parameters? (y/n) [n]:y > Maximum interleaving delay downstream (0~63 ms) [16]:40 > Maximum interleaving delay upstream (0~63 ms) [6]:50 > Will you set parameters for rate? (y/n) [n]:y > Minimum transmit rate downstream (32~32000 Kbps) [32]:100 > Minimum reserved transmit rate downstream (100~32000 Kbps) [100]:500 > Maximum transmit rate downstream (500~32000 Kbps) [24544]:1000 > Minimum transmit rate upstream (32~6000 Kbps) [32]:200 > Minimum reserved transmit rate upstream (2006000 Kbps) [200]:300 > Maximum transmit rate upstream (300~6000 Kbps) [1024]:400 > Will you set rate thresholds? (y/n) [n]:y > Rate threshold downshift downstream (0~32000 Kbps) [0]:100 > Rate threshold upshift downstream (0~32000 Kbps) [0]:200 > Rate threshold downshift upstream (0~6000 Kbps) [0]:300 > Rate threshold upshift upstream (0~6000 Kbps) [0]:400 > Will you set retransmission function (y/n) [n]:y > Enable or disable retransmission function in downstream 1-enable 2-disable(1~2) [2]:1 > Maximum INP on downstream direction: > 1-noProtection 2-halfSymbol 3-singleSymbol 4-twoSymbols > 5-threeSymbols 6-fourSymbols 7-fiveSymbols 8-sixSymbols > 9-sevenSymbols 10-eightSymbols 11-nineSymbols 12-tenSymbols > 13-elevenSymbols 14-twelveSymbols 15-thirteenSymbols 16-fourteenSymbols > 17-fifteenSymbols 18-sixteenSymbols > Please select (1~18) [1]:3 > Minimum rtxratio in downstream (0~255) [0]:5 > Minimum rsoverhead in downstream (0~128) [0]: > Enable or disable retransmission function in upstream 1-enable 2-disable (1~2) [2]:1 > Maximum INP on upstream direction: > 1-noProtection 2-halfSymbol 3-singleSymbol 4-twoSymbols > 5-threeSymbols 6-fourSymbols 7-fiveSymbols 8-sixSymbols > 9-sevenSymbols 10-eightSymbols 11-nineSymbols 12-tenSymbols > 13-elevenSymbols 14-twelveSymbols 15-thirteenSymbols 16-fourteenSymbols > 17-fifteenSymbols 18-sixteenSymbols > Please select (1~18) [1]:3 > Minimum rtxratio in upstream (0~255) [0]:5 > Minimum rsoverhead in upstream (0~128) [0]: > Will you set erasure decoding? (y/n) [n]:y > Erasure decoding switch 1-enable 2-disable (1~2) [2]:1 Add profile 2 successfully
The system displays the message "Add profile x successfully" after an ADSL2+ channel profile is created successfully. The x is the number of the created channel profile.
The following table describes the parameters in response to the adsl channel-profile add 2 command.
Do you want to name the profile
If you select "y" for this option, the system uses the input string as the name of the channel profile.
If you select "n", the system uses the default name of the channel profile (ADSL CHANNEL PROFILE x). The x is the number of the channel profile created.
Minimum impulse noise protection downstream/upstream
INP defines that how many DMT consecutive symbols can be protected. That is, how many consecutive error DMT symbols in a specified byte can be rectified in the case of de-interleaving. The upstream and downstream INP is set separately. The options for symbol length are: no protection, a half symbol, a single symbol, two symbols......sixteen symbols.
INP is defined as the protected consecutive DMT symbols but not the impulse noise duration. The impulse noise duration is related with DMS symbol ratio. For example, if INP is 16, the duration for each symbol is 250 μs because an ADSL line sends 4000 DMT symbols each second. Thus, INP=16 indicates that the impulse noise in length of 16 * 1/4000 = 4 ms is permitted.
Maximum interleaving delay downstream/upstream
Indicates the maximum interleave delay in downstream/upstream. The interleave delay refers to the delay caused by interleave processing. The interleave delay is related to interleave depth, bit length and line rate. By default, ADSL2+ works in interleave channel mode.
Minimum transmit rate downstream/upstream
Indicates the minimum rate in upstream/downstream. The minimum rate must be smaller than or equal to the minimum reserved rate. When the adaptation mode for the transmission rate in a channel profile is fixed, the maximum activation rate must be the same as the minimum rate in the same direction. When the rate adaptation mode is not fixed, the maximum rate must be larger than the minimum rate.
Minimum reserved transmit rate downstream/upstream
Indicates the minimum reserved rate in downstream/upstream. The minimum reserved rate must be larger than or equal to the minimum rate, and smaller than or equal to the maximum rate. When the transmission rate in the line profile adopts the auto-adaptation mode, the rate is adjusted based on such a value.
Maximum transmit rate downstream/upstream
Indicates the maximum rate in upstream/downstream. The maximum rate must be larger than or equal to the minimum reserved rate. When the adaptation mode for the transmission rate in a channel profile is fixed, the maximum activation rate must be the same as the minimum rate in the same direction. When the rate adaptation mode is not fixed, the maximum rate must be larger than the minimum rate.
Rate threshold downshift downstream/upstream
Indicates the rate downshift threshold in downstream/upstream. When the transmission rate in the line profile adopts the auto-adaptation mode, if the downshifted downstream/upstream rate exceeds such a threshold, an alarm is generated.
Rate threshold upshift downstream/upstream
Indicates the rate upshift threshold in downstream/upstream. When the transmission rate in the line profile adopts the auto-adaptation mode, if the upshifted downstream/upstream rate exceeds such a threshold, an alarm is generated.
Set retransmission function