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Author Topic: PhyR and SRA Enabled?  (Read 10004 times)

jid

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PhyR and SRA Enabled?
« on: January 12, 2015, 05:30:22 PM »

Just took a look at my line stats, and notably the profile commands, and two things I noticed:

Quote
# xdslcmd profile --show

Modulations:
   G.Dmt   Enabled
   G.lite   Enabled
   T1.413   Enabled
   ADSL2   Enabled
   AnnexL   Enabled
   ADSL2+   Enabled
   AnnexM   Disabled
   VDSL2   Enabled
Phone line pair:
   Inner pair
Capability:
   bitswap      On
   sra      On
   trellis      On
   sesdrop      Off
   CoMinMgn   Off
   24k      On
   phyReXmt(Us/Ds)   Off/On
   TpsTc      AvPvAa
   monitorTone:   On
   dynamicD:   On
   dynamicF:   Off
   SOS:      On
   Training Margin(Q4 in dB):   -1(DEFAULT)

It appears that SRA is on, and phyReXmt is on for downstream? I assume this is G.INP?

Or does this simply mean the HG612 does support these, no that they are enabled?
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Kind Regards
Jamie

BT FTTP - 75meg | Sky Q |  Bridgend Weather

pooclah

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Re: PhyR and SRA Enabled?
« Reply #1 on: January 12, 2015, 06:59:21 PM »

I would say that the modem supports them but they are not in use.

The output from my Zyxel VMG8924-b10a is exactly the same, but the synch stays constant while the SNRM fluctuates slightly, so I know SRA is not working.

Code: [Select]
Capability:
        bitswap         On
        sra             On
        trellis         On
        sesdrop         Off
        CoMinMgn        Off
        24k             On
        phyReXmt(Us/Ds) Off/On
        TpsTc           AvPvAaPa
        monitorTone:    On
        dynamicD:       On
        dynamicF:       Off
        SOS:            On
        Training Margin(Q4 in dB):      -1(DEFAULT)
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jid

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Re: PhyR and SRA Enabled?
« Reply #2 on: January 12, 2015, 07:38:53 PM »

Thanks for confirming, was just wondering as it didn't seem to make that clear  :)
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Kind Regards
Jamie

BT FTTP - 75meg | Sky Q |  Bridgend Weather

Chrysalis

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Re: PhyR and SRA Enabled?
« Reply #3 on: January 12, 2015, 07:47:20 PM »

Sorry to burst the bubble but yes the hg612 will report SRA on even tho its off.

Its easy to know if SRA is on by seeing if the sync speed moves around during sync.
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pooclah

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Re: PhyR and SRA Enabled?
« Reply #4 on: January 12, 2015, 08:04:55 PM »

Still at least the modem has it switched on if the decision is ever made to enable it on the DSLAM.
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Chrysalis

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Re: PhyR and SRA Enabled?
« Reply #5 on: January 12, 2015, 08:15:49 PM »

yep
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NewtronStar

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Re: PhyR and SRA Enabled?
« Reply #6 on: January 12, 2015, 08:17:51 PM »

Sorry to burst the bubble but yes the hg612 will report SRA on even tho its off.
Its easy to know if SRA is on by seeing if the sync speed moves around during sync.

I would think OpenReach would get a big slap in the face by all ISP customer if the ECI/HG612 were not able to make use of SRA on the modem if and when it's enabled  ;)
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m0aur

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Re: PhyR and SRA Enabled?
« Reply #7 on: October 16, 2015, 12:54:10 PM »

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anything