re: splitter
>>Does this splitting have a perceptable detrimental effect on the quality of voice traffic<<
voice traffic would be ok, but there is a considerable detrimental effect on data/internet connection speeds above 28k, which is as good as it gets under the carrier/pair gain systems.
basically, u have a 64k channel muxed down to facilitate at least two connexions, which meanz the max data speed for each of 32k, most likely 28k when overhead is taken into account.
for info on pair gain, see here "[broken link removed]
just substitute eircom for Telstra......