Patchboard and Telephone exchange

Patchboard noun - Telephone central where circuits are completed with patchcords.

Telephone exchange and patchboard are semantically related. In some cases you can use "Telephone exchange" instead a noun "Patchboard".

Telephone exchange noun - A workplace that serves as a telecommunications facility where lines from telephones can be connected together to permit communication.

Patchboard and telephone exchange are semantically related. Sometimes you can replace term "Patchboard" with "Telephone exchange", this terms are similar.