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Telephone companies normally do not guarantee data throughput speeds. When you ask your telephone company to fix a noisy line, you may be told you need a data line or conditioned circuit. This is usually an expensive solution. Modems can perform well on a good quality voice circuit. Ideally you want your system tested with a sophisticated line tester (a "bit error rate tester" or "data test set") rather than the regular line tester. You can also ask the company to switch you to a different cable pair from the central office. Sometimes, people solve the problem by ordering a different phone number.

Chapter Header
Telephone companies normally do not guarantee data throughput speeds. When you ask your telephone company to fix a noisy line, you may be told you need a data line or conditioned circuit. This is usually an expensive solution. Modems can perform well on a good quality voice circuit. Ideally you want your system tested with a sophisticated line tester (a "bit error rate tester" or "data test set") rather than the regular line tester. You can also ask the company to switch you to a different cable pair from the central office. Sometimes, people solve the problem by ordering a different phone number.

Chapter Header
Telephone companies normally do not guarantee data throughput speeds. When you ask your telephone company to fix a noisy line, you may be told you need a data line or conditioned circuit. This is usually an expensive solution. Modems can perform well on a good quality voice circuit.