isdnFRP(D4isdn)

isdnFRP -- ISDN facility request parameter structure

Synopsis

   #include <sys/types.h>
   #include <sys/scoisdn.h>
   
   typedef struct isdnFRP
   {
       isdnWord_t  function;
       isdnWord_t  toneDuration;
       isdnWord_t  gapDuration;
       struct
       {
           isdnByte_t  digits[MAX_NUMBER_DIGITS];
       } DTMFdigits;
   } isdnFRP_t;

Description

The isdnFRP structure provides additional information for the ISDN_FACILITY.ISDN_REQ(D7isdn) message depending on the value of isdnFacility(D4isdn):

ISDN_FACILITY_HANDSET (0x0000)

Parameter does not apply (coded as a structure of 0 length).

ISDN_FACILITY_DTMF (0x0001)

function

1: start DTMF listen on B-channel data
2: stop DTMF listen
3: send DTMF
4 to n: reserved

toneDuration

time in ms for one digit; default is 40ms

gapDuration

time in ms between digits; default is 40ms

digits

characters to be sent, coded as IA5-char. '0' to '9', '*', '#', 'A', 'B', 'C', or 'D'

References

Intro(D4isdn), Intro(D7isdn)

isdnFacility(D4isdn), isdnFCP(D4isdn), isdnFIP(D4isdn)

``SCO ISDN adapter drivers'' in Developing MDI network adapter drivers.