For the first time since the telephone was invented, one worker could call another inside the company, as well as connect to an outside line without any operator assistance whatsoever.
Dialing an outside line involves telling the system to give you an outside line and then speaking the number.
Meanwhile, officers at some stations found they could not get an outside line from landline phones.
After a little time for thought, he picked up the phone, got an outside line, and punched in the seven digits.
The green telephone, the outside line, rang at five past twelve.
We seem to have problems with our telephones getting an outside line.
Anyway, after much searching for mobile phone numbers in and around people's desks and much cursing while trying to work out how to get an outside line, I made my escape.
A private branch exchange is a private telephone network used within an enterprise in which users share a certain number of outside lines for external telephone calls.
Give each member of your team their own outside line.
Definition of outside line in US English:
outside line
noun
A telephone connection to an external dial tone, for outgoing calls.
（电话）外线
Example sentencesExamples
For the first time since the telephone was invented, one worker could call another inside the company, as well as connect to an outside line without any operator assistance whatsoever.
We seem to have problems with our telephones getting an outside line.
A private branch exchange is a private telephone network used within an enterprise in which users share a certain number of outside lines for external telephone calls.
The green telephone, the outside line, rang at five past twelve.
Give each member of your team their own outside line.
Meanwhile, officers at some stations found they could not get an outside line from landline phones.
Dialing an outside line involves telling the system to give you an outside line and then speaking the number.
Anyway, after much searching for mobile phone numbers in and around people's desks and much cursing while trying to work out how to get an outside line, I made my escape.
After a little time for thought, he picked up the phone, got an outside line, and punched in the seven digits.