Extension number transmission method and device, electronic equipment and computer readable storage medium

The invention provides an extension number transmission method and device, electronic equipment and a computer readable storage medium, and relates to the technical field of intelligent network communication. The extension number transmission method comprises the following steps: receiving a call instruction; extracting a switchboard number and an extension number in the call instruction; constructing a first INVITE message according to the switchboard number and the extension number; and sending the first INVITE message to an operator network, so that after the operator network receives the first INVITE message, performing session initiation protocol (SIP) signaling conversion on the first INVITE message to obtain a second INVITE message, and sending the second INVITE message to the switchboard platform, so that after the switchboard platform receives the second INVITE message, identifying the extension number from the second INVITE message to connect the extension number line. The problem that extension num