2
2 lines of symmetry
2 Lines in the same plane that do not meet are parallel. If 2 lines are in different planes and do not meet, then they are called skew lines.
4
Rectangle
Most countries use 2 line corded phones. This simply means there are two different lines that can go to the same phone. Most companies now use cordless phones, but there are some who still use corded phones.
Overall, the Polycom Soundstation 2 receives good reviews. The main limitations seem to be that it does not work with multiple phone lines, and can only be used with analogue phone lines.
Phone lines using the RJ11 jack (the phone jack) have 4 wires...Colors of those are black yellow red and green. The Red(tx) and Green(rx) are for LINE1 (which is the primary phone number, usually) The Yellow(Tx) and Black(Rx) lines are for LINE2 (Which is for the secondary phone line, which most Phone services do not include in their standarized packages).
Ok i found Ameritech home phone service is offering 2 home phone lines for only $24.95 per month. wow what a deal, vist their web site at usameritech.com
Use a 1 to 2 phone jack splitter and then a filter on your DSL jack.
bcouse it has more like 6
If your phone is not an IP phone well you need an adapter to interface it to your IP system. In connecting phone lines, there are some configurations that must be done. A service provider (ringcentral,phonepeople,800pbx) can help you with that.
yes yes
2
Make a conference call, then invite them together.
2
To convert a 1 line phone system into a 2 line phone system you will need a phone that has two input jacks and two separate phone lines coming into the building. Each phone line will be plugged into one of the input jacks and the phone will then be able to receive calls on either line.