through my landline

[Silver]

Hi,

I was on the phone talking to someone but not with my cell phone, I wonder if I can say:

I am talking to you through my land line.

Thanks a lot

Should it be "through the land line", "in the land line", "in my land line" or what?

 

[perpend]

I'd typically say "on my land line".

 

[Oeco]

Oh prepositional issues! I would say "on my land line."

 

[Biffo]

In general we talk on a piece of electronic equipment.

Examples
John is talking on his phone.
The professor often speaks about popular science on the radio.