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Voice API for Windows Operating Systems Library Reference — November 2003 391
set physical parameters of a channel or board device — dx_setparm( )
!
!!
! Channel Parameter Defines
For DM3 boards, the supported channel parameter defines are shown in Table 14. All time units are
in multiples of 10 msec unless otherwise noted.
DXBD_OFFHDLY 2 R/W 50 Offhook Delay. Period after offhook, during which no events are
generated; that is, no DTMF digits will be detected during this
period (10 msec units).
DXBD_P_BK 2 R/W 6 Pulse Dial Break. Duration of pulse dial off-hook interval (10 msec
units)
DXBD_P_IDD 2 R/W 100 Pulse Interdigit Delay. Time between digits in pulse dialing(10 msec
units)
DXBD_P_MK 2 R/W 4 Pulse Dial Make. Duration of pulse dial offhook interval (10 msec
units)
DXBD_PAUSETM 2 R/W 200 Pause Time. Delay caused by a comma in the dialing string (10
msec units)
DXBD_R_EDGE 1 R/W ET_ROFF Ring Edge. Detection of ring edge, values can be:
• ET_RON – beginning of ring
• ET_ROFF – end of ring
DXBD_R_IRD 2 R/W 80 Inter-ring Delay. Maximum time to wait for the next ring (100 msec
units). Used to distinguish between calls. Set to 1 for T-1
applications.
DXBD_R_OFF 2 R/W 5 Ring-off Interval. Minimum time for ring not to be present before
qualifying as “not ringing” (100 msec units)
DXBD_R_ON 2 R/W 3 Ring-on Interval. Minimum time ring must be present to qualify as a
ring (100 msec units)
DXBD_S_BNC 2 R/W 4 Silence and Non-silence Debounce. Length of a changed state
before call status transition message is generated (10 msec units)
DXBD_SYSCFG 1 R - System Configuration. JP8 status for D/4x boards.
• 0 – loop start interface (JP8 in)
• 1 – DTI/xxx interface (JP8 out)
DXBD_T_IDD 2 R/W 5 DTMF Interdigit delay. Time between digits in DTMF dialing (10
msec units)
DXBD_TTDATA 1 R/W 10 DTMF length (duration) for dialing (10 msec units)
Table 13. Voice Board Parameters (Springware) (Continued)
Define Bytes
Read/
Write
Default Description
Table 14. Voice Channel Parameters (DM3)
Define Bytes
Read/
Write
Default Description
DXCH_AGC_MAXGAIN 2 W 116 Automatic Gain Control. Specifies the maximum gain measured
in 0.1 dB units. The default value of 116 is equivalent to 11.6
dB.
DXCH_AGC_MEMORY
MAXIMUMSIZE
2 W 300 Automatic Gain Control. Specifies the maximum size of
memory measured in 1 msec units.