dwBearerModes and dwMaxRate in LINEDEVCAPS
Article ID: 108306
Article Last Modified on 8/16/2005
APPLIES TO
- Microsoft Windows Software Development Kit 3.11
- Microsoft Win32 Software Development Kit (SDK) 4.0, when used with:
- Microsoft Win32 Software Development Kit (SDK) for Windows NT 4.0
This article was previously published under Q108306
SUMMARY
A Windows Telephony application queries the service provider for device
capabilities via a call to lineGetDevCaps. The dwMaxRate member of the
LINEDEVCAPS structure indicates the digital data transmission rate of the
bearer mode. This field is intended to indicate the maximum data rate for
bearer modes that directly support DATA transmissions, such as
LINEBEARERMODE_DATA or LINEBEARERMODE_ALTSPEECHDATA.
If the service provider does not support a DATA bearer mode, it can set
dwMaxRate to 0 (zero) or use this field to indicate the maximum rate of
data supported for other bearer modes that it does support. For example,
if LINEBEARERMODE_VOICE is supported by a service provider that also
supports LINEMEDIAMODE_DATAMODEM, dwMaxRate could indicate the maximum
modem baud rate available for the line. However, if both DATAMODEM and
DATA are available on the same line (for example, an ISDN adapter with a
digital modem), then dwMaxRate would indicate the maximum
LINEBEARERMODE_DATA rate.
Additional query words: 1.00 4.00 TAPI
Keywords: KB108306