A couple of things on the 4mb upgrades

damian24

Senior Member
Joined
Apr 5, 2005
Messages
840
1) A question was asked as to if you upgrade to 1mb will your line get 4mb access during the trial. Well, i've done this to one of my lines and YES the data rate was upped to 4mb on the ADSL side. the BRAS still needs to be upgraded but this is a user account issue so that will be automatic for all ADSL users.

2) If found the old marconi routers are crud, my line handled 6.8mb/s quite comfortably during the test phase and with the marconi I started seeing errors and had almost no connection (+- 2km from exchange) with the 4mb link, checked on a cisco (clean as a wistle), plugged in a billion 5100 and 5102W also the lines great, tested on the old Alcatel speedtouch home (that okay too!)

Lesson, test with something other than the marconi before getting Telkom to down your datarate to 1mb if you've got problems.

3) had a Telkom 5100 ADSL router that popped, took it into Telkom and they swopped it out for a 5102 wireless, I don't know if this is standard now as the old stuff is now in short supply, but if your Telkom 5100 is in warrantee and toasted you may get a 5102W instead.... Yipee

4) lastly, to give you an idea of what the attenuation and SNR is on a FTTC (Fibre to the Curb) installation. from this the theory seems to indicate, a maximum data rate of 8MB on this line as capacity utilization is only 47% on 4MB, the uplink is a little worse off, but max uplink would be a shade under 768kb/s

Now why don't we all have these kinds of links... with a DSLAM 50 metres away!

ATU-R (DS) ATU-C (US)
Modem Status: Showtime (DMTDSL_SHOWTIME)
DSL Mode: ITU G.992.1 (G.DMT)
ITU STD NUM: 0x01 0x01
Vendor ID: 'ALCB' 'TSTC'
Vendor Specific: 0x0000 0x0000
Vendor Country: 0x00 0xB5
Capacity Used: 47% 53%
Noise Margin: 16.0 dB 12.0 dB
Output Power: -3.0 dBm 2.0 dBm
Attenuation: 5.5 dB 4.0 dB
Defect Status: None None
Last Fail Code: None
Selftest Result: 0x00
Subfunction: 0x15
Interrupts: 2639 (4 spurious)
Activations: 12
Init FW: embedded
Operartion FW: embedded
SW Version: 3.9.220
FW Version: 0x1A04

Interleave Fast Interleave Fast
Speed (kbps): 0 4096 0 384
Reed-Solomon EC: 0 0 0 0
CRC Errors: 0 0 0 0
Header Errors: 0 0 0 0
Bit Errors: 0 0
BER Valid sec: 0 0
BER Invalid sec: 0 0

LOM Monitoring : Disabled

DMT Bits Per Bin
00: 0 0 0 0 0 0 0 0 0 2 4 5 6 6 6 6
10: 6 7 7 7 7 7 7 6 6 6 5 4 4 5 0 0
20: 0 0 0 0 0 0 0 2 2 2 3 4 4 4 4 5
30: 5 5 5 6 6 6 6 6 6 7 7 7 7 7 7 7
40: 0 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
50: 7 7 7 7 7 7 7 7 7 7 7 2 7 7 7 7
60: 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
70: 7 6 7 7 7 7 7 7 7 7 7 6 6 6 6 6
80: 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6
90: 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6
A0: 6 6 6 6 5 5 6 6 5 6 5 5 5 5 5 5
B0: 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
C0: 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
D0: 5 5 5 5 5 5 5 5 5 5 5 5 5 5 4 4
E0: 4 4 4 4 4 4 4 4 4 4 4 4 4 3 2 2
F0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 
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