I am a new Spark (Telecom) ADSL customer (new to ADSL in general- cable internet previously) and have noticed that the service, particularly the speed, is very unreliable and poor. Now I understand that the speed of an ADSL service is influenced by many factors, e.g. internal house wiring, distance to the exchange/DSLAM box, network load, etc. but I'm seeing quite a random change- drop and rise on the line speed reported by the modem stats. Let me describe my observations.
Upon first (new) connection, the speed test results showed a speed of about 1.2Mbps down and 0.8Mbps up, 30ms ping. I am in suburban Wellington and about 1.6km from the nearest exchange. To me these stats and performance seemed pretty awful.
The next couple of days I noticed that after every modem reboot or the one-off DSL line drop-out, after the subsequent DSL synchronisation by the modem, the reported modem stats changed dramatically- downstream (and upstream) line rates swung from 4000+ kbps (1500 kbps) to 300 kbps (300 kbps)! The performance on the speed test website reflected these modem-reported stats, where at one point at its lowest, I could barely load a webpage.
I called up the tech desk and they asked me to perform a speed test with them on the other end, and they could confirm that the speed was unusually low (about 0.3 Mbps at this stage) and said that they noticed that that was the line speed sent out from the exchange itself. Hours after another modem reboot, the line speed was back up at around 4 Mbps, only for the DSL connection to drop out and the speed returning down to about 1.3 Mbps.
This behaviour, either by the modem (HG630b) or the actual provisioning of the ADSL service, seems VERY bizarre to me, not to mention annoying and under-performing. I'm attaching the latest stats reported by the modem.
Line standard ADSL2+ Channel type Interleaved Downstream line rate (kbit/s) 1101 Upstream line rate (kbit/s) 733 Downstream SNR (dB) 12 Upstream SNR (dB) 10.9 Downstream line attenuation (dB) 36.5 Upstream line attenuation (dB) 23.4 Downstream output power (dBmV) 18.8 Upstream output power (dBmV) 12.4 Downstream CRC 0 Upstream CRC 0 Downstream FEC 0 Upstream FEC 0
Has anybody else experienced similar issues or is anyone able to shed some light as to what and why this could be happening? Your help is much appreciated!
Edit: Latest speed test; painfully slow DL.
<a href="https://www.speedtest.net/my-result/3677932576"><img src="https://www.speedtest.net/result/3677932576.png" /></a>