Setting up Modems for Streamyx

Setting up Modems for Streamyx Tips:

1 DSL Technologies

1.1 ADSL
Asymmetric Digital Subscriber Line

ITU G.992.1 - G.DMT - 8.0Mbit/s, 1.0Mbit/s
ITU G.992.2 - G.Lite - 1.5Mbit/s, 0.5Mbit/s
ITU G.992.3/4 - ADSL2 - 12Mbit/s, 1.0Mbit/s
ITU G.992.5 - ADSL2+ - 24Mbit/s, 1.0Mbit/s

1.2 SDSL
Symmetric Digital Subscriber Line

1.3 SHDSL
Symmetric high-speed digital subscriber line

ITU G.991

1.4 VDSL
Very high bit-rate Digital Subscriber Line

ITU G.993.1 - VDSL
ITU-T G.993.2 - VDSL2

2 Signal Level Guide

2.1 ADSL

Downstream SNR = 15 dB.

Higher is better, minimum = 6 dB.

Downstream Power = < 15 dBm.

Lower is better.

Upstream SNR = 10 dB.

Higher is better.

Upstream Power = < 15 dBm.

Lower is better.

Downstream Attenuation = < 30 dB

Lower is better, maximum = 60 dB.

Upstream Attenuation = < 30 dB

Lower is better, maximum = 60 dB.

2.2 ADSL2+

Downstream SNR = 06 dB.

Higher is not better, within range is better = 05 - 07 dB.

Downstream Power = < xx dBm.

Lower is better.

Upstream SNR = 06 dB.

Higher is not better, within range is better = 05 - 07 dB.

Upstream Power = < xx dBm.

Lower is better.

Downstream Attenuation = < 22 dB

Lower is better, maximum = 22 dB (for 10mbps), 12 dB (for ~25mbps).

Upstream Attenuation = < 22 dB

Lower is better, maximum = 22 dB (for 10mbps), 12 dB (for ~25mbps).

3 VPI/VCI ( IMPORTANT ) - Failing to adhere modem won't dial

For Streamyx, VPI = 0 , VCI = 35

Belkin Modems = VPI = 0 , VCI = 35 ( defaults at VPI = 0 , VCI = 38 )

Thomson Modems VPI/VCI = 0.35 ( default at 8.35 )

Username : abc@streamyx ( replace abc with your username )

Password : xxxx ( replace xxx with your password )

CASE STUDIES :

DSL Status: UP
DSL Modulation Mode: GDMT
DSL Path Mode: FAST
Downstream Rate: 1024 Kbps
Upstream Rate: 512 Kbps
Downstream Margin: 22 db <-- 13yrs old telephone line
Upstream Margin: 8 db
Downstream Line Attenuation: 54
Upstream Line Attenuation: 31
Downstream Transmit Power: 0
Upstream Transmit Power: 0

PVC Connection
Connection: 1
Encapsulation: RFC 2516 PPPoE
Multiplexing: llc
Qos: UBR
Pcr Rate: 0
Scr Rate: 0
Autodetect: Disable
VPI: 0
VCI: 35
Enable: Yes
PVC Status: Applied -- OK

Solution : Now the DS Margin is 22dB and you're able to get 1024 / 512.. old telephone cables do give problems if they deteriorate too badly.. check and see if the cables connecting to the socket/ junction box that you plug your phone line in, are they black in color due to being struck by lightning often ? If they are, try to cut off the carbonised section and connect back using the section which is in good condition.

Source: E Mobile Enterprise