Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[nicefile]

Hi All
This is my fist post here
I'm looking for answer to the issue I have with VDSL2 synchronization bands
I have two BCM6368 modems DGND3800 and other AV4202N
When synced DGND3800B cannot use 1 of 3 available download bands

G993 report status Band Plan Phase 0/1 -> Discovery/Medley 0
DS Band Plan(PHYS): 3 bands
G993 report status Band Plan Phase 0/1 -> Discovery/Medley 1
DS Band Plan(NEG): 2 bands

compared to output on AV4202N
G993 report status Band Plan Phase 0/1 -> Discovery/Medley 0
DS Band Plan(PHYS): 3 bands
G993 report status Band Plan Phase 0/1 -> Discovery/Medley 1
DS Band Plan(NEG): 3 bands

This is causing synchronization is lower for DGND3800 by ~10%
Also I did swap to AnnexA phy blob with the same result

Full training output from dslgiag in attachment . I've used total commander to compare them both.

Is this could be hardware or software related problem ?  Is there any way to force modem to use this 3rd band ?

update:
don't look at crappy 5800 Sync US limit as it is set by me as I'm on 50/5 connection and there is no need for more
current stat@DGND3800
~ # adsl info --pbParams
adsl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason:    0
Last initialization procedure status:   0
Max:    Upstream rate = 14712 Kbps, Downstream rate = 48016 Kbps
Bearer: 0, Upstream rate = 5800 Kbps, Downstream rate = 44414 Kbps

Discovery Phase (Initial) Band Plan
US: (32,63) (882,1193) (1984,2770)
DS: (65,857) (1218,1959) (2795,4083)
Medley Phase (Final) Band Plan
US: (32,63) (882,1193) (1984,2738)
DS: (65,857) (1218,1959)
                  VDSL Port Details               Upstream                Downstream
Attainable Net Data Rate:           14712 kbps              48016 kbps
Actual Aggregate Tx Power:             8.4 dBm               13.3 dBm
====================================================================================
VDSL Band Status         U0      U1      U2       U3       U4      D1      D2       D3
  Line Attenuation(dB):  9.7     36.1    53.0     N/A     N/A    18.5    43.7    64.4
Signal Attenuation(dB):  9.7     36.0   52.8     N/A     N/A    18.5    43.7    N/A
        SNR Margin(dB):  15.8    15.3    12.4     N/A     N/A     6.4     6.3      N/A
         TX Power(dBm):  -3.7     5.7     4.4       N/A     N/A    11.8    7.8      N/A

[lf2k]

Don't know if this will help, but I just did a quick diff on the two files...

DGND3800:

Code: [Select]

Broadcom DSL Version B2pvC038h3, Built on 03/25/2013 13:29:12
Chip=0x636800B2 afeId=0x10620300  afeChip=1 afeLD=3, afeFeVer=620300
...
DS Band Plan(NEG): 2 bands
Start Tone 65 Stop Tone 857
Start Tone 1218 Stop Tone 1959
...
DSL G.992 receive SHOWTIME active, rxDataRate = 44470 kbps
DSL Latency PathId: 0
DSL G.992 transmit SHOWTIME active, txDataRate = 14506 kbps
DSL Latency PathId: 0

AV4202N:

Code: [Select]

Broadcom DSL Version A2pv6C039o, Built on 10/31/2014 15:29:33
Chip=0x636800B2 afeId=0x10608100  afeChip=1 afeLD=3, afeFeVer=608100
...
DS Band Plan(NEG): 3 bands
Start Tone 73 Stop Tone 857
Start Tone 1218 Stop Tone 1959
Start Tone 2795 Stop Tone 3277
...
DSL G.992 receive SHOWTIME active, rxDataRate = 48285 kbps
DSL Latency PathId: 0
DSL G.992 transmit SHOWTIME active, txDataRate = 5800 kbps
DSL Latency PathId: 0
...so same chipset, can see you're on an ECI cab etc.  But the firmware/modem driver blob is significantly older on the Netgear (no surprise there!).

Why you're missing DS3 on the Netgear is anyone's guess, but I suspect it's the older firmware - I'll have a better look when I get in from work this evening...

*ninja edit*
See that your top end download is being sacrificed to give you higher upload on the Netgear...

[nicefile]

old version is not the case here as I've tried A2pv6C039o1.d24h from 11.11.2014 with the same resoult.
Now I'm looking to replace adsldd.ko from real AnnexA firmware (version magic '2.6.21.5 mod_unload MIPS32_R1 32BIT ')
On DGND3800 Max upstream rate is even higher than on AV4202N on same blob

~ # xdslctl info --version
xdslctl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason:    1
Last initialization procedure status:   0
Max:    Upstream rate = 14530 Kbps, Downstream rate = 49243 Kbps
Bearer: 0, Upstream rate = 5800 Kbps, Downstream rate = 44024 Kbps

xdslctl version 1.0
ADSL PHY: AnnexA version - A2pv6C039o1.d24h