Verizon LG G2

[Daniel Gidanian]

I open the Contacts app on my phone. I click on the Phone Number field to enter a phone number. The numeric input keypad pops up. On the right-hand side, there is a key to toggle to an additional keypad, this toggle key containing a jumble of characters. I click it, and it toggles to this second keypad. I attached a picture of this second keypad. What do the following input characters do or perform, when entered with a number in the number entry field, and at what point does one enter the particular character in with the number at?:
/ forward slash
, comma
. period
N Letter "N"
[space] space key