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Vigor 2766 G.fast slow speed
- xer0w
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                18 Jul 2023 11:35                #102667
        by xer0w
    
    
            
            
            
            
            
            
            
			
    
                                                
    
        Vigor 2766 G.fast slow speed was created by xer0w            
    
	        Hi,
I recently "upgraded" from a Vigor 2762 (used in combination with an MT992 G.fast modem) to a Vigor 2766ac, mainly so that I could do away with the external modem, however, since installing the 2766 my speed has dropped considerably.
I used to consistently get 300Mbps download and 48Mbps upload speed with my old setup, now with the 2766 it's dropped to 180/48. After reading some post on this forum, it seems that the built in modem has some compatibility issues with BT cabinets (Huawei ones), which I think is what I'm connected to (going by the Chipset Vendor on the stats: BDCM), so I was expecting a small drop in speed, but not almost half!
I've tried changing the modem codes, but it's actually worse (if it connects al all) on the other ones.
Here are my current line stats (the SNR is high because of all the reboots I've been doing, its usually down in the 6dB range)
Any help appreciated, or settings to try etc (I'm ok using the CLI).
    I recently "upgraded" from a Vigor 2762 (used in combination with an MT992 G.fast modem) to a Vigor 2766ac, mainly so that I could do away with the external modem, however, since installing the 2766 my speed has dropped considerably.
I used to consistently get 300Mbps download and 48Mbps upload speed with my old setup, now with the 2766 it's dropped to 180/48. After reading some post on this forum, it seems that the built in modem has some compatibility issues with BT cabinets (Huawei ones), which I think is what I'm connected to (going by the Chipset Vendor on the stats: BDCM), so I was expecting a small drop in speed, but not almost half!
I've tried changing the modem codes, but it's actually worse (if it connects al all) on the other ones.
Here are my current line stats (the SNR is high because of all the reboots I've been doing, its usually down in the 6dB range)
Code:
  --------------------------- ATU-R Info (hw: annex A, f/w: annex X) -----------
   Running Mode            :   G.fast       State                : SHOWTIME
   DS Actual Rate          :187044000 bps   US Actual Rate       : 49320000 bps
   DS Attainable Rate      :194923000 bps   US Attainable Rate   : 49932000 bps
   DS Path Mode            :        Fast    US Path Mode         :        Fast
   DS Interleave Depth     :        0       US Interleave Depth  :        0
   NE Current Attenuation  :      127 dB    Cur SNR Margin       :        9  dB
   DS actual PSD           :     0. 0 dB    US actual PSD        :     4. 2  dB
   NE Rcvd Cells           :        0       NE Xmitted Cells     :        0
   NE CRC Count            :        0       FE CRC Count         :        0
   NE ES Count             :        0       FE  ES Count         :        0
   Xdsl Reset Times        :        0       Xdsl Link  Times     :        1
   ITU Version[0]          : fe004452       ITU Version[1]       : 41590000
   ADSL Firmware Version   : 12-3-2-3-0-5
   Power Management Mode   : DSL_G997_PMS_L0
   Test Mode               : DISABLE
   nBandPlan               :        0
  -------------------------------- ATU-C Info ---------------------------------
   Far Current Attenuation :      127 dB    Far SNR Margin       :        3  dB
   CO ITU Version[0]       : b5004244       CO ITU Version[1]    : 434dc20d
   DSLAM CHIPSET VENDOR    : < BDCM >
Any help appreciated, or settings to try etc (I'm ok using the CLI).
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- devonkev
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                26 Jul 2023 11:59                #102688
        by devonkev
    
    
            
            
            
            
            
            
            
			
    
                                                
    
        Replied by devonkev on topic Re: Vigor 2766 G.fast slow speed            
    
	        I can only go from personal experience, however I've never had a positive experience with a Draytek DSL modems.
I've tried ADSL, ADSL+ and VDSL over the years with Draytek, I've never had a good experience compared to other vendors.
Experiences includes disconnects and slow sync speeds every time.
The routers themselves are fantastic, it's just the DSL interfaces that just don't cut it.
    I've tried ADSL, ADSL+ and VDSL over the years with Draytek, I've never had a good experience compared to other vendors.
Experiences includes disconnects and slow sync speeds every time.
The routers themselves are fantastic, it's just the DSL interfaces that just don't cut it.
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- xer0w
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                27 Jul 2023 16:41                #102699
        by xer0w
    
    
            
            
            
            
            
            
            
			
    
                                                
    
        Replied by xer0w on topic Re: Vigor 2766 G.fast slow speed            
    
	        Thanks for the reply. 
I've come to the same conclusion after some testing, so I'm now back to using the MT992 on WAN2 and have disabled the built in modem.
    I've come to the same conclusion after some testing, so I'm now back to using the MT992 on WAN2 and have disabled the built in modem.
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- edinburgh
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                29 Jul 2023 14:17                #102706
        by edinburgh
    
    
	        
Same here. Lines with no noise spikes seem to be handled well by Draytek, but not when there are issues, such as REIN or SHINE.
            
            
			            
        
    
            
            
            
            
            
            
            
			
    
                                                
    
        Replied by edinburgh on topic Re: Vigor 2766 G.fast slow speed            
    devonkev wrote:
I can only go from personal experience, however I've never had a positive experience with a Draytek DSL modems.
I've tried ADSL, ADSL+ and VDSL over the years with Draytek, I've never had a good experience compared to other vendors.
Experiences includes disconnects and slow sync speeds every time.
The routers themselves are fantastic, it's just the DSL interfaces that just don't cut it.
Same here. Lines with no noise spikes seem to be handled well by Draytek, but not when there are issues, such as REIN or SHINE.
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- devonkev
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                30 Jul 2023 14:58                #102709
        by devonkev
    
    
	        
Having taken a quick look, the MT992 looks like the Royles Royce of modems in terms of VDSL.
    
            
            
            
            
            
            
            
			
    
                                                
    
        Replied by devonkev on topic Re: Vigor 2766 G.fast slow speed            
    xer0w wrote:
Thanks for the reply.
I've come to the same conclusion after some testing, so I'm now back to using the MT992 on WAN2 and have disabled the built in modem.
Having taken a quick look, the MT992 looks like the Royles Royce of modems in terms of VDSL.
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