Kitz Forum
Broadband Related => Broadband Technology => Topic started by: Alex Atkin UK on March 20, 2019, 05:22:23 PM
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HG612:
Discovery Phase (Initial) Band Plan
US: (6,31) (882,1193) (1984,2770)
DS: (33,857) (1218,1959) (2795,4083)
Medley Phase (Final) Band Plan
US: (6,31) (882,1193) (1984,2770)
DS: (41,857) (1218,1959) (2795,4083)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 21813 kbps 63788 kbps
Actual Aggregate Tx Power: 3.8 dBm 13.8 dBm
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VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
Line Attenuation(dB): 3.5 15.6 23.5 N/A N/A 8.0 19.6 31.0
Signal Attenuation(dB): 3.2 15.4 23.4 N/A N/A 9.9 19.5 31.1
SNR Margin(dB): 8.0 6.0 6.0 N/A N/A 6.3 6.3 6.3
TX Power(dBm): -6.4 -30.3 3.5 N/A N/A 11.1 7.4 7.3
VMG3925-B10B V5.13(AAVF.12)C0:
Discovery Phase (Initial) Band Plan
US: (6,31) (882,1193) (1984,2770)
DS: (33,857) (1218,1959) (2795,4083)
Medley Phase (Final) Band Plan
US: (6,31) (882,1193) (1984,2770)
DS: (41,857) (1218,1959) (2795,4083)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 21841 kbps 63920 kbps
Actual Aggregate Tx Power: 6.4 dBm 13.8 dBm
====================================================================================
VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
Line Attenuation(dB): 4.4 16.3 26.3 N/A N/A 8.7 20.2 33.2
Signal Attenuation(dB): 4.1 16.1 26.2 N/A N/A 10.7 20.1 33.2
SNR Margin(dB): 9.9 6.7 6.1 N/A N/A 6.1 6.1 6.2
TX Power(dBm): -6.7 -29.3 6.2 N/A N/A 11.2 7.4 7.3
kl0(dBx100): 769 819 N/A N/A N/A 639 774 841
HG612:
Max: Upstream rate = 21813 Kbps, Downstream rate = 63788 Kbps
Bearer: 0, Upstream rate = 20000 Kbps, Downstream rate = 63554 Kbps
Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode(0x0)
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 6.3 6.0
Attn(dB): 13.1 0.0
Pwr(dBm): 13.8 3.8
VDSL2 framing
Bearer 0
MSGc: 18 150
B: 239 236
M: 1 1
T: 21 5
R: 0 16
S: 0.1202 0.3771
L: 15976 5410
D: 1 1
I: 240 255
N: 240 255
VMG3925-B10B:
Max: Upstream rate = 21844 Kbps, Downstream rate = 63912 Kbps
Bearer: 0, Upstream rate = 20000 Kbps, Downstream rate = 63904 Kbps
Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode(0x0)
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 6.1 6.4
Attn(dB): 13.8 0.0
Pwr(dBm): 13.8 6.4
VDSL2 framing
Bearer 0
MSGc: 18 150
B: 239 236
M: 1 1
T: 21 5
R: 0 16
S: 0.1195 0.3771
L: 16064 5410
D: 1 1
I: 240 255
N: 240 255
Red is HG612, Blue is VMG3925-B10B:
(https://csdprojects.co.uk/forums/HG612%20vs%20VMG3925-B10B.png)
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Plusnet vs Zen on VMG3925-B10B
(https://csdprojects.co.uk/forums/SNRpertone-2019-03-22-18.25.57.png)
(https://csdprojects.co.uk/forums/SNRpertone-2019-03-22-18.26.19.png)
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Presumably, in your first post you tried both devices on the same pair? If so, it is apparent that the VMG3925-B10B is showing slightly more loop loss than the HG612. But otherwise, the performance is the essentially the same, within a small margin.
I experienced the same thing with 8800NL vs 8800AXLR2 with loop loss (I believe the former was worse), though to a smaller degree. Point stands, variance between modems is normal. I have another 8800NL spare that I could try, and I have a feeling it is the better one (one that shows less loop loss). Not right now, but perhaps in the future.
Though, the QLN baffles me the most. ???
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I'm disappointed its not working any better than the HG612 but at least they are newer firmware with potential for updates, more flexible for reuse later, a nicer colour (black just kinda blends into the background) and the LEDs are a nice shade of green rather than the eye-burning green the ECI/HG612 use.
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Diminishing or even negative returns while a hole burns in your pocket as you seek the performant unit? :P Been there, done that. Though since FTTC I get full 80/20 with no stability issues so I don't faff anymore.
Perhaps not all is lost as the Zyxel may actually be more stable, with more uses and newer firmware as you mentioned. Plus the HG612 has aged, become discontinued. Would be interesting to see if the error rate is lower over a period of time.
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Yeah I didn't really keep records of error rate, although I do have automated hourly logs from telnet so theoretically I could work it out manually checking comparable uptimes. Not much chance I can be bothered though. ;)
Not sure it would tell much anyway as the load is now split across both connections unevenly (I push bulk traffic over PlusNet exclusively leaving Zen for more responsive browsing, streaming, etc) so naturally I'd expect more errors on whichever line is most heavily loaded at each moment.
The only load-balanced connections are my main PC, laptop and games consoles - where the combined speed is useful for downloading games. I didn't want say my mum to trip up on a website that doesn't like the IP switching, although I haven't found one yet. (a good website shouldn't judge sessions by IP but apparently some banks still do for "security")