business online ordering systems

One or two phone lines?
I am creating a phone system for my company. I sent two lines, one for voice and one for DSL / Fax. I was told that the second line will also do. I'll be online full time. Two lines phone are the benefits? Can handle two phone lines online? The only advantage we can see is the ablity to call on the second line for incoming calls time to enter a line that appears. Thank you!
For both DSL and a fax number on line 2, you must connect the fax line DSL filter. This is the only way you can use another device in the range of DSL services in February.
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