landline
n.a phone that is connected to a house or office by a physical wire. You use this instead of a mobile phone or a satellite connection.
n.a conventional telecommunications connection that uses a physical wire or optical fiber for transmission. Often contrasted with mobile or satellite telephony.
“I still use a landline because the mobile signal is weak here.”
“The office maintains a landline to ensure that emergency calls can be made even during a power outage.”
“While younger generations have largely abandoned the landline in favor of mobile devices, many businesses retain fixed-line connections for their perceived reliability and superior audio quality.”
Often used as a modifier in noun phrases like 'landline phone' or 'landline number'.
From land + line.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.