ADSL noise while on the phone

Hi,

I have had my attention drawn recently to the amount of cracking on our telephone line. Upon further investgation I found that this was being generated by our Linksys AM200 ADSL modem. Once the modem was disconnected the line was clear. Assuming a fault I sent it back to the vendor who acknowledged a fault and sent me a replaceent. Unfortunately, the replacement exhibits the same kind of crackly noise. Assuming an inherent fault with this model, I tried a completely different brand of modem only to find that this too has the same problem.

Now it was my understanding that you can use the phone line and be online at the same time and that broadband equipment was designed to allow you to do this. Being thorough I also tested various kinds of ADSL filters - I have 4 to hand, ranging from cheap (£2.00) to very expensive (£10).. Neither made any difference.

My question is, is it normal to have this cracking on an ADSL line while the modem is connected? Can one get an ADSL modem that does not exhibit this kind of problem? What models are recommended?

I do not have cable so ADSL is the ony option apart from dial-up.

.

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