Description: This table is used to add, delete, modify, and query the PSTN user. The index of this entry is hwPstnCTPConfigIndex. The service attributes of a PSTN port include the gateway ID, terminal ID, telephone number, whether to support layering configuration, priority flag of the port for the overload control, user type, power-off interval, FSK delay interval, time for issuing the calling number, format for issuing the calling number, and limited pulse dialing. Through the table, you can configure, modify, and query the above-mentioned attributes of the PSTN user.