The new telephone exchange equipment offered vertical service code calling features such as call forwarding and call waiting which was incompatible with party line technology.
Strictly speaking, there are supposed to be more safeguards required to set up call forwarding, and it's supposed to take more than a working email address to push it through.
To illustrate the example, we consider a telephone line provided to a customer, and we assume that both call forwarding and call waiting are enabled on the line.
Call forwarding typically can redirect incoming calls to any other domestic telephone number, but the owner of the forwarded line must pay any toll charges for forwarded calls.
The phone features are pretty much what you would expect: quad-band world roaming, a speakerphone, call waiting, call forwarding, conference calling, voice dialing, and text and multimedia messaging.