My parents live in a new suburb with Orcon internet as their internet provider. For at least a year now they have been getting speed of 2.5mbit download maximum, which is very low.
A week ago tho they changed the battery in their answering machine, and internet has suddenly gone up to 8.1mbit (they have a ADLS1 modem, so technically it is the max) and a 0db line attenuation.
So if you have a dissapointing internet speed, changing the battery in your voicemail may help:)
Hope it works!