usr/config$ pt

RTP payload type configuration and information
Usage:
pt -print         Display the RTP payload type information
   -rfc2833       Configurate the DTMF RFC2833 payload type
   -dtmf          Configurate the DTMF payload type
   -fax           Configurate the FAX payload type
   -faxbypass     Configurate the FAX ByPass payload type
   -modembypass   Configurate the MODEM ByPass payload type
   -redundancy    Configurate the Redundancy payload type
   -modemrelay    Configurate the MODEM Relay payload type

Example:
    pt -rfc2833 96 -fax 101

usr/config$ pt -print

RTP payload type information
        RFC2833 payload type       : 101
        DTMF payload type          : 100
        FAX payload type           : 101
        FAX ByPass payload type    : 102
        MODEM ByPass payload type  : 103
        Redundancy payload type    : 104
        MODEM Relay payload type   : 105
usr/config$