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130 posts

Master Geek

# 32064 10-Apr-2009 08:56
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Maximum line rate: 1896 kbps (downstream) / 968 kbps (upstream)
Noise margin: 4 dB (downstream) / 6.5 dB (upstream)
Line attenuation: 42.3 dB (downstream) / 26.2 dB (upstream)
Output power: 17 dBm (downstream) / 12.5 dBm (upstream)

3km from exchange, donwstream rate was 4200kbps


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94 posts

Master Geek

  # 206310 10-Apr-2009 10:02
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Something's probably awry at the exchange end, e.g. a messed up port config.  Unless the noise margins have been purposely set to those levels by you (in your modem) or by a tech (at the exchange), then they are almost certainly indicative of a bad port config (normally one would expect a target noise margin of 12 dB up/down, irrespective of what the line quality actually is), not to mention the fact that the downstream sync rate is also much too low.  Your modem could conceivably be faulty in some way, although it's less likely than a DSLAM port issue.

Ring your ISP and ask them to do a port reset (or even rebuild if that doesn't help), but expect to cover some other basic diagnostics as well, like rebooting your router, doing an isolation test, etc.

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