Properties

The Properties entry contains the binary properties structure that Unimodem requires in order to respond to the GetCommProperties API.

Eight DWORD hexadecimal values are used. For example,


HKR,, Properties, 1, 80,01,00,00, ff,00,00,00, ff,00,00,00, 07,00,00,00, 0f,00,00,00, f7,03,00,00, 00,c2,01,00, 40,38,00,00

The Profile Calculator tool can be used to create this value.

The Properties entry can be thought of as a C structure, as follows:


typedef struct ModemProp {
DWORD    DialOptions;                // bitmap of supported options
DWORD    CallSetupFailTimeout;       // Maximum value in seconds
DWORD    InactivityTimeout;          // Maximum value in units 
                                  // specified by InactivityScale
DWORD    SpeakerVolume;              // bitmap of supported values
DWORD    SpeakerMode;                // bitmap of supported values
DWORD    ModemOptions;               // bitmap of supported values
DWORD    MaxDTERate;                 // Maximum value in bit/s
DWORD    MaxDCERate;                 // Maximum value in bit/s
} ModemProp

The DialOptions DWORD is a bit vector of the embedded commands that the modem supports in dial commands:

DIALOPTION_DIALBILLING

0x00000040

Supports wait for bong "$"

DIALOPTION_DIALQUIET

0x00000080

Supports wait for quiet "@"

DIALOPTION_DIALDIALTONE

0x00000100

Supports wait for dial tone "W"


These characters ('&', '@', 'W') cannot be changed. If they are not the same for the modem, these settings can not be used at all. For example, if the modem supports "Wait for bong tone", but uses '!' instead of '&', it must not set DIALOPTION_DIALBILLING, and Unimodem will proceed as if it does not support "Wait for bong tone".

A description of the other elements in the Modem Properties structure follows.

CallSetupFailTimeout

This is the maximum value that can be set for the call setup timer. The call setup time is the delay between dialing and responding to an incoming carrier signal after initial connection. If the modem does not detect a carrier within this time, the modem hangs up. If the modem does not have this feature, set the value to 0.

See also Settings, CallSetupFailTimer registry entry documenation.

InactivityTimeout

This is the maximum value that can be set for the data inactivity timer. The Inactivity timeout is the period of data inactivity, while on-line, after which the modem hangs up. If the modem does not have this feature, set the value to 0.

To convert to the maximum value in seconds, multiply this number by the value in InactivityScale.

See also Settings, InactivityTimeout registry entry documentation.

SpeakerVolume

This is a bit vector of possible speaker volume settings


Supports low speaker volume

0x00000001

Supports med speaker volume

0x00000002

Supports high speaker volume

0x00000004



See also corresponding Settings, SpeakerVolume_XXX registry settings.

SpeakerMode

This is a bit vector of possible speaker mode settings.


Supports speaker mode off

0x00000001

Supports speaker mode dial

0x00000002

Supports speaker mode on

0x00000004

Supports speaker mode setup

0x00000008


See also corresponding Settings, SpeakerMode_XXX registry settings.

ModemOptions

This is a bit vector of settings that can be changed using lineSetDevConfig.


0x00000001

Supports enabling/disabling of data compression negotiation

0x00000002

Supports enabling/disabling of error control protocol negotiation

0x00000004

Supports enabling/disabling of forced error control

0x00000008

Supports enabling/disabling of a cellular protocol

0x00000010

Supports enabling/disabling of hardware flow control

0x00000020

Supports enabling/disabling of software flow control

0x00000040

Supports CCITT/Bell toggling

0x00000080

Supports enabling/disabling of speed negotiation

0x00000100

Supports tone and pulse dialing

0x00000200

Supports blind dialing

0x00000400

Supports CCITT V.21-V.22/CCITT V.23 toggling



See also corresponding Settings, ErrorControl; Settings, FlowControl; Settings, Compression; Setting, Modulation; Settings, SpeedNegotiation; Settings, Pulse; Settings, Tone; Settings, Blind registry entry documentation.

MaxDTERate

The maximum data rate supported between the modem and the computer.

MaxDCERate:

The maximum data transmission speed modem to modem.


See also Registry Entry Name