ADSL2 Sync Rate plummeted

Forums › Spark New Zealand (including Skinny and BigPipe) › ADSL2 Sync Rate plummeted - help?

wasabi2k

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#108925 8-Sep-2012 20:46

Hi All,
Just wanting to see if I am missing anything here.

Been a happy Telecom ADSL2+ user for ages - syncing at 16Mbps. I have been away in Hamilton for a week, came back and noticed my downloads were a bit sluggish. Check my router and sure enough it is now syncing at 6Mbps.

Nothing has changed my end (nothing visible anyway).

My possibilities:
1. Router shat itself - trying another tomorrow
2. Lines somehow damaged in weather - see line details below - look OK
3. Telecom dodginess at the cabinet

So dsl stats - from what I can gather attenuation etc should be fine for the speeds I was getting before.
ATM0
Alcatel 20190 chipset information
ATU-R (DS) ATU-C (US)
Modem Status: Showtime (DMTDSL_SHOWTIME)
DSL Mode: ITU G.992.5 (ADSL2+) Annex A
ITU STD NUM: 0x03 0x2
Chip Vendor ID: 'STMI' 'BDCM'
Chip Vendor Specific: 0x0000 0xA18E
Chip Vendor Country: 0x0F 0xB5
Modem Vendor ID: 'CSCO' 'BDCM'
Modem Vendor Specific: 0x0000 0x0000
Modem Vendor Country: 0xB5 0xB5
Serial Number Near: FHK101630GP
Serial Number Far:
Modem VerChip ID: C196 (0) capability-enabled
DFE BOM: DFE3.0 Annex A (1)
Capacity Used: 99% 100%
Noise Margin: 10.5 dB 12.0 dB
Output Power: 18.5 dBm 12.5 dBm
Attenuation: 22.0 dB 29.0 dB
Defect Status: None None
Last Fail Code: None
Watchdog Counter: 0x01
Watchdog Resets: 0
Selftest Result: 0x00
Rang Telecom faults, because my internet is working someone is going to ring me in the next FIVE days. Sigh.

Anyone with any other bright ideas?

plambrechtsen

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#683235 8-Sep-2012 21:28

First of all Telecom don't own the cabinets anymore that's Chorus :)

When you rang up broadband support did you ask them what your expected speed should be and to run a line test? Normally if you ask Telecom to send out a Chorus tech they do it when the person next has time and they do a line check at the pole to make sure its all ok.

Standard approach is needed to first do an isolation test. Then to connect your modem directly up to the inbound pair to your house. Them see if that improves things. I had my overhead wire replaced when I moved to Telecom 2 years ago since things weren't right at all.

Can you also post any stats of the error rates at all since they were missing.

chevrolux

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#683248 8-Sep-2012 22:12

At 29dB attenuation I would expect to see 10-12ish Mbps. Definately just check your plug in filters. You mention the weather... is your house on piles? Do you suspect the wiring is in bad condition? and finally, does it get damp under the house?
Normally when someone says it goes funny int the weather it is a joint under the house that has corroded away over time. If you have wiring maintenance just get tech to come out. Otherwise will be costly for you in terms of fault fees if the fault is in the house and not in the network.

wasabi2k

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#684475 11-Sep-2012 16:41

As usual the issue was mine :)

Got the sparky in doing other stuff - apparently there was a wire that was loose to the point of coming off entirely. He was shocked we got any sync at all. Quick fix - now back at 14Mbps. YAY!

FE BOM:         DFE3.0 Annex A (1)
Capacity Used:   99%                             100%
Noise Margin:    11.5 dB                         11.5 dB
Output Power:    18.5 dBm                        12.0 dBm
Attenuation:     13.5 dB                          5.0 dB
Defect Status:   None                            None

bit better now :)

wasabi2k

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#684836 12-Sep-2012 11:16

Now the attenuation is so low I am wondering if I could be syncing even higher - most graphs have that attenuation at around 20Mb. Hmm.

ubergeeknz

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Vocus

#684837 12-Sep-2012 11:19

wasabi2k: Now the attenuation is so low I am wondering if I could be syncing even higher - most graphs have that attenuation at around 20Mb. Hmm.

Either master filter or disconnect your other extensions from the master (if you don't need 'em). That should bump it up, made about 2Mb difference for me.