Connection to PSTN and PLMN

The MX-ONE system connects to the Public Switched Telephone Network (PSTN) and the Public Land Mobile Network (PLMN) via trunk interfaces, which are housed in either the Media Gateway Classic or Media Gateway Lite.

For enhanced security, ISDN signaling is terminated within the Media Gateway Classic or Media Gateway Lite. Communication with the MX-ONE Service Node utilizes internal signaling protocols. Additionally, ISDN D-channel services, such as X.25 over an ISDN D-channel, are not supported. This restriction prevents external lines from accessing the LAN.