Maybe what you are referring to is the telephone receiver that is located in the package shelf when it's lowered. It's a little black box with wires going to it. Can't use it because the phone is analog.
as in a telephone jack, a jack in a deck of cards, and a jack used to change a flat tire which is usually stored in the trunk of a car.
A trunk
Tandem Trunk is a trunk circuit which connects a tandem switch to another tandem switch or to a telephone company central office.
Trunk
In the UK, STD (as in Subscriber Trunk Dialling) came into use gradually in the late 1950s.
00 91, followed by the Indian domestic telephone number without the trunk prefix 0.
Replace the trunk prefix 0 of the Malaysian number with telephone country code +60.
Subscriber Trunk Dialing - the now-normal method of direct dialling a distant number. Until the 1950s in the UK you had to call the operator to get a long-distance call ('trunk call').
On a mobile phone, +61, followed by the Australian number, omitting the trunk prefix 0. On a landline phone, 00 61, followed by the Australian number, omitting the trunk prefix 0.
It sometimes connects two local telephone COs It provides a direct connection between an organization's PBX and local CO
The telephone country code for the UK is +44, and then you must drop the trunk prefix 0 from the UK domestic telephone number. For example, Liverpool's area code 0151 becomes +44 151. Follow the instructions on the card to access the Roshan network. Then dial 00 44 and the UK number, omitting the trunk prefix 0.
The telephone country code for New Zealand is +64, and you must also drop the trunk prefix 0 from the beginning of the N.Z. domestic phone number. The telephone country code for the United States is +1.