How do I hook up phone line to cm1200 modem

> How do I hook up phone line [...]

   A problem report which contained some useful information might get
better answers sooner.  About what are you talking?

   "phone line"?  Are you trying to connect a DSL "phone line" to a
cable modem?  Are you trying to use some kind of telephone (not a "phone
line") for voice service from your cable ISP?  Or what?