Hi people:

I am a Snap Naked DSL customer and my DSL line has always been pretty good, having lived just about 100 meters from the cabinet.  I also recalled that I always had interleaving switched OFF on my line, and whilst performing a speedtest to Snap's CHC Server on speedtest.net.nz, I always get about < 30ms latency (usually around 23-25 ms).  However, I noticed that "recently", my latency has almost doubled to close to 50 ms.  I noticed too, that my uplink sync has gone from a usual, constant 969 kbps to about 1240 kbps, and that increase in uplink sync seem to correspond with my cabinet being upgraded to VDSL2+ capable in April/May this year.  I wondered whether would interleaving been turned on with the card upgrade?  I rang Snap tech support yesterday and they said my line is still showing as interleaving off, but they are hot sure why my latency would have doubled in that time.

Attached is the link stats from my modem - I am using a TP-Link TD-W8960N.  





Mode:
ADSL_2plus


Traffic Type:
ATM


Status:
Up


Link Power State:
L0 


 


 
Downstream
Upstream


Line Coding(Trellis):
On
On


SNR Margin (0.1 dB):
120
128


Attenuation (0.1 dB):
125
45


Output Power (0.1 dBm):
0
128


Attainable Rate (Kbps):
19520
1296


 


 
Path 0
 
Path 1
 


 
Downstream
Upstream
Downstream
Upstream


Rate (Kbps):
16591
1240
0
0


 


MSGc (# of bytes in overhead channel message):
60
9
0
0


B (# of bytes in Mux Data Frame):
254
155
0
0


M (# of Mux Data Frames in FEC Data Frame):
1
1
0
0


T (Mux Data Frames over sync bytes):
2
1
0
0


R (# of check bytes in FEC Data Frame):
0
0
0
0


S (ratio of FEC over PMD Data Frame length):
0.4908
4.0
0.0
0.0


L (# of bits in PMD Data Frame):
4156
312
0
0


D (interleaver depth):
1
1
0
0


Delay (msec):
0.12
1.0
0.0
0.0


INP (DMT symbol):
0.0
0.0
0.0
0.0


 


Super Frames:
92384
99682
0
0


Super Frame Errors:
0
0
0
0


RS Words:
0
0
0
0


RS Correctable Errors:
0
0
0
0


RS Uncorrectable Errors:
0
0
0
0


 


HEC Errors:
0
0
0
0


OCD Errors:
0
0
0
0


LCD Errors:
0
0
0
0


Total Cells:
58555611
0
0
0


Data Cells:
1338190
0
0
0


Bit Errors:
0
0
0
0


 


Total ES:
0
0


Total SES:
0
0


Total UAS:
16
16




From the stats I can't decipher whether interleaving is off or on - the Line Coding says it is ON, but I am not sure if that is interleaving.  I am just wondering any of you know anything about how to decipher the DSL stats from my modem?

Thanks.

p/s: I am quite happy sync my sync up rates and speeds, just that I am puzzled as to why my latency has suddenly doubled.