Huawei MA5600 - Page 41

NGN Cases Chapter 2 MA5600T (IP DSLAM) Cases
Confidential Information of Huawei. No Spreading without Permission
36
Author: Chandler Young
Product Family:
Broadband Access
Product:
MA5600T MSAN
Fault Type:
ADSL Access Service
Keywords: line-rate SNR
Permission
Level:
01Huawei Engineers Permission
Phenomenon De
scription:
Q:
1.When we configure (in the same line) one line profile to 6 Mega in ADSL and ADSL2+, we can view that we
Alarm Informatio
n:
null
Cause Analysi
s:
null
Handling Proces
s:
A:
1.Firstly, SNR margin in order to anti cable noise when those tones bearing bit.
2. The transmit power have two purposes: one part of power would be used for providing the line rate; the ot
h
3. So, this phenomenon is completely normalization; because ADSL’s bandwidth just have half of adsl2+ (ads
4. If you disable ADSL2+’s tones 256 to 511, the SNR is calculated considering the same tones. It means tha
t
To add an extended ADSL2+ line profile and disable the tones 80–90, do as follows:
huawei(config)#adsl extline-profile add
{ <cr>|profile-index<L><1,32> }:
Command:
adsl extline-profile add
Start adding profile
Notes: If pilot tone is included in the forbidden tones, the link may not be activated
When port activated with annexA in mode G992.1, 64tone is pilot
When port activated with annexB in mode G992.1, 96tone is pilot
Press 'Q' to quit the current configuration and new configuration will be
neglected
> Do you want to name the profile (y/n) [n]:n
> Will you configure the disabled tone? (y/n)[n]:y
> How many sections do you want to configure?(1-4)[4]:1
> No.1 Please input the start index of the disabled tone(32-511)[32]:80
> Please input the end index of the disabled tone(32-511)[32]:90
> Do you want to validate the settings of this section? (y/n)[n]:y
> Will you configure the minimum INP in downstream? (y/n)[n]:
> Will you configure the minimum INP in upstream? (y/n)[n]:
> Will you configure the maximum PSD mask in downstream? (y/n)[n]:
Add profile 1 successfully
huawei(config)#display adsl extline-profile 1
------------------------------------------------------------------
Profile Index : 1 Name: ADSL EXTLINEPROFILE 1
Minimum INP in downstream(DMT Symbol) :auto
Minimum INP in upstream(DMT Symbol) :auto
Maximum PSD mask in downstream(-dBm/Hz) :40
ADSL transmission mode in standard :-
ADSL annex type :-
Current configuration of each section:
Sections Value Effective
Section 1 80 - 90 y
Section 2 0 - 0 n
Section 3 0 - 0 n
Section 4 0 - 0 n
Suggestions and
Summary:
Null