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OpalLineInterfaceDevice Class Reference

#include <lid.h>

List of all members.

Public Types
enum	{ MaxVolume = 100 }
enum	AECLevels {   AECOff, AECLow, AECMedium, AECHigh,   AECAuto, AECAGC, AECError }
enum	{ DefaultDTMFOnTime = 180, DefaultDTMFOffTime = 120 }
enum	CallProgressTones {   NoTone = 0x00, DialTone = 0x01, RingTone = 0x02, BusyTone = 0x04,   FastBusyTone = 0x08, ClearTone = 0x10, CNGTone = 0x20, MwiTone = 0x40,   AllTones = 0x4f }
enum	T35CountryCodes {   Japan, Albania, Algeria, AmericanSamoa,   Germany, Anguilla, AntiguaAndBarbuda, Argentina,   Ascension, Australia, Austria, Bahamas,   Bahrain, Bangladesh, Barbados, Belgium,   Belize, Benin, Bermudas, Bhutan,   Bolivia, Botswana, Brazil, BritishAntarcticTerritory,   BritishIndianOceanTerritory, BritishVirginIslands, BruneiDarussalam, Bulgaria,   Myanmar, Burundi, Byelorussia, Cameroon,   Canada, CapeVerde, CaymanIslands, CentralAfricanRepublic,   Chad, Chile, China, Colombia,   Comoros, Congo, CookIslands, CostaRica,   Cuba, Cyprus, Czechoslovakia, Cambodia,   DemocraticPeoplesRepublicOfKorea, Denmark, Djibouti, DominicanRepublic,   Dominica, Ecuador, Egypt, ElSalvador,   EquatorialGuinea, Ethiopia, FalklandIslands, Fiji,   Finland, France, FrenchPolynesia, FrenchSouthernAndAntarcticLands,   Gabon, Gambia, Germany2, Angola,   Ghana, Gibraltar, Greece, Grenada,   Guam, Guatemala, Guernsey, Guinea,   GuineaBissau, Guayana, Haiti, Honduras,   Hongkong, Hungary, Iceland, India,   Indonesia, Iran, Iraq, Ireland,   Israel, Italy, CotedIvoire, Jamaica,   Afghanistan, Jersey, Jordan, Kenya,   Kiribati, KoreaRepublic, Kuwait, Lao,   Lebanon, Lesotho, Liberia, Libya,   Liechtenstein, Luxemborg, Macao, Madagascar,   Malaysia, Malawi, Maldives, Mali,   Malta, Mauritania, Mauritius, Mexico,   Monaco, Mongolia, Montserrat, Morocco,   Mozambique, Nauru, Nepal, Netherlands,   NetherlandsAntilles, NewCaledonia, NewZealand, Nicaragua,   Niger, Nigeria, Norway, Oman,   Pakistan, Panama, PapuaNewGuinea, Paraguay,   Peru, Philippines, Poland, Portugal,   PuertoRico, Qatar, Romania, Rwanda,   SaintKittsAndNevis, SaintCroix, SaintHelenaAndAscension, SaintLucia,   SanMarino, SaintThomas, SaoTomeAndPrincipe, SaintVicentAndTheGrenadines,   SaudiArabia, Senegal, Seychelles, SierraLeone,   Singapore, SolomonIslands, Somalia, SouthAfrica,   Spain, SriLanka, Sudan, Suriname,   Swaziland, Sweden, Switzerland, Syria,   Tanzania, Thailand, Togo, Tonga,   TrinidadAndTobago, Tunisia, Turkey, TurksAndCaicosIslands,   Tuvalu, Uganda, Ukraine, UnitedArabEmirates,   UnitedKingdom, UnitedStates, BurkinaFaso, Uruguay,   USSR, Vanuatu, VaticanCityState, Venezuela,   VietNam, WallisAndFutuna, WesternSamoa, Yemen,   Yemen2, Yugoslavia, Zaire, Zambia,   Zimbabwe, NumCountryCodes, UnknownCountry = -1 }
enum	{ DIAL_TONE_TIMEOUT = 10000 }
Public Methods
	OpalLineInterfaceDevice ()
virtual BOOL	Open (const PString &device)=0
virtual BOOL	IsOpen () const
virtual BOOL	Close ()
virtual PString	GetDeviceType () const=0
virtual PString	GetDeviceName () const=0
virtual PStringArray	GetAllNames () const=0
virtual PString	GetDescription () const=0
virtual unsigned	GetLineCount ()=0
virtual BOOL	IsLineTerminal (unsigned line)
virtual BOOL	IsLinePresent (unsigned line, BOOL force=FALSE)
virtual BOOL	IsLineOffHook (unsigned line)=0
virtual BOOL	SetLineOffHook (unsigned line, BOOL newState=TRUE)=0
virtual BOOL	SetLineOnHook (unsigned line)
virtual BOOL	HookFlash (unsigned line, unsigned flashTime=200)
virtual BOOL	HasHookFlash (unsigned line)
virtual BOOL	IsLineRinging (unsigned line, DWORD *cadence=NULL)
virtual BOOL	RingLine (unsigned line, DWORD cadence)
virtual BOOL	RingLine (unsigned line, PINDEX nCadence, unsigned *pattern)
virtual BOOL	IsLineDisconnected (unsigned line, BOOL checkForWink=TRUE)
virtual BOOL	SetLineToLineDirect (unsigned line1, unsigned line2, BOOL connect)
virtual BOOL	IsLineToLineDirect (unsigned line1, unsigned line2)
virtual OpalMediaFormatList	GetMediaFormats () const=0
virtual BOOL	SetReadFormat (unsigned line, const OpalMediaFormat &mediaFormat)=0
virtual BOOL	SetWriteFormat (unsigned line, const OpalMediaFormat &mediaFormat)=0
virtual OpalMediaFormat	GetReadFormat (unsigned line)=0
virtual OpalMediaFormat	GetWriteFormat (unsigned line)=0
virtual BOOL	SetReadCodec (unsigned line, RTP_DataFrame::PayloadTypes codec)
virtual BOOL	SetWriteCodec (unsigned line, RTP_DataFrame::PayloadTypes codec)
virtual BOOL	SetRawCodec (unsigned line)
virtual BOOL	StopReadCodec (unsigned line)
virtual BOOL	StopWriteCodec (unsigned line)
virtual BOOL	StopRawCodec (unsigned line)
virtual BOOL	SetReadFrameSize (unsigned line, PINDEX frameSize)
virtual BOOL	SetWriteFrameSize (unsigned line, PINDEX frameSize)
virtual PINDEX	GetReadFrameSize (unsigned line)=0
virtual PINDEX	GetWriteFrameSize (unsigned line)=0
virtual BOOL	ReadFrame (unsigned line, void *buf, PINDEX &count)=0
virtual BOOL	WriteFrame (unsigned line, const void *buf, PINDEX count, PINDEX &written)=0
virtual BOOL	ReadBlock (unsigned line, void *buf, PINDEX count)
virtual BOOL	WriteBlock (unsigned line, const void *buf, PINDEX count)
virtual unsigned	GetAverageSignalLevel (unsigned line, BOOL playback)
virtual BOOL	EnableAudio (unsigned line, BOOL enable=TRUE)
BOOL	DisableAudio (unsigned line)
virtual BOOL	IsAudioEnabled (unsigned line)
virtual BOOL	SetRecordVolume (unsigned line, unsigned volume)
virtual BOOL	SetPlayVolume (unsigned line, unsigned volume)
virtual BOOL	GetRecordVolume (unsigned line, unsigned &volume)
virtual BOOL	GetPlayVolume (unsigned line, unsigned &volume)
virtual AECLevels	GetAEC (unsigned line)
virtual BOOL	SetAEC (unsigned line, AECLevels level)
virtual unsigned	GetWinkDuration (unsigned line)
virtual BOOL	SetWinkDuration (unsigned line, unsigned winkDuration)
virtual BOOL	GetVAD (unsigned line)
virtual BOOL	SetVAD (unsigned line, BOOL enable)
virtual BOOL	GetCallerID (unsigned line, PString &idString, BOOL full=FALSE)
virtual BOOL	SetCallerID (unsigned line, const PString &idString)
virtual BOOL	SendCallerIDOnCallWaiting (unsigned line, const PString &idString)
virtual BOOL	SendVisualMessageWaitingIndicator (unsigned line, BOOL on)
virtual BOOL	PlayDTMF (unsigned line, const char *digits, DWORD onTime=DefaultDTMFOnTime, DWORD offTime=DefaultDTMFOffTime)
virtual char	ReadDTMF (unsigned line)
virtual BOOL	GetRemoveDTMF (unsigned line)
virtual BOOL	SetRemoveDTMF (unsigned line, BOOL removeTones)
virtual CallProgressTones	IsToneDetected (unsigned line)
virtual CallProgressTones	WaitForToneDetect (unsigned line, unsigned timeout=3000)
virtual BOOL	WaitForTone (unsigned line, CallProgressTones tone, unsigned timeout=3000)
virtual BOOL	SetToneFilter (unsigned line, CallProgressTones tone, const PString &description)
virtual BOOL	SetToneFilterParameters (unsigned line, CallProgressTones tone, unsigned lowFrequency, unsigned highFrequency, PINDEX numCadences, const unsigned *onTimes, const unsigned *offTimes)
virtual BOOL	PlayTone (unsigned line, CallProgressTones tone)
virtual BOOL	IsTonePlaying (unsigned line)
virtual BOOL	StopTone (unsigned line)
virtual BOOL	PlayAudio (unsigned line, const PString &filename)
virtual BOOL	StopAudio (unsigned line)
virtual BOOL	RecordAudioStart (unsigned line, const PString &filename)
virtual BOOL	RecordAudioStop (unsigned line)
virtual CallProgressTones	DialOut (unsigned line, const PString &number, BOOL requireTones=FALSE, unsigned uiDialDelay=0)
T35CountryCodes	GetCountryCode () const
PString	GetCountryCodeName () const
virtual BOOL	SetCountryCode (T35CountryCodes country)
virtual BOOL	SetCountryCodeName (const PString &countryName)
virtual PStringList	GetCountryCodeNameList () const
int	GetErrorNumber () const
PString	GetErrorText () const
virtual void	PrintOn (ostream &strm) const
Static Public Methods
PString	GetCountryCodeName (T35CountryCodes code)
T35CountryCodes	GetCountryCode (const PString &name)
OpalLineInterfaceDevice *	Create (const PString &type, void *parameters=NULL)
PStringList	GetAllTypes ()
PStringList	GetAllDevices ()
Protected Methods
int	getOsHandle () const
void	setOsHandle (int os_handleToSet)
int	getOsError () const
void	setOsError (int osErrorToSet)
const PBYTEArray &	getReadDeblockingBuffer ()
const PBYTEArray &	getWriteDeblockingBuffer ()
PINDEX	getReadDeblockingOffset () const
void	setReadDeblockingOffset (PINDEX readDeblockingOffset)
PINDEX	getWriteDeblockingOffset () const
void	setWriteDeblockingOffset (PINDEX writeDeblockingOffset)
unsigned int	getCardNumber () const
void	setCardNumber (unsigned int uiCardNumber)
unsigned int	getDialToneTimeout () const
void	setDialToneTimeout (unsigned int uiDialToneTimeout)
Protected Attributes
int	os_handle
int	osError
T35CountryCodes	countryCode
PBYTEArray	m_readDeblockingBuffer
PBYTEArray	m_writeDeblockingBuffer
PINDEX	m_readDeblockingOffset
PINDEX	m_writeDeblockingOffset
unsigned int	m_uiCardNumber
unsigned int	m_uiDialToneTimeout

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Detailed Description

Line Interface Device abstraction. Note all functions in this device abstraction are assumed to be thread atomic.

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Member Enumeration Documentation

anonymous enum

Enumeration values: MaxVolume

anonymous enum

Enumeration values: DefaultDTMFOnTime  DefaultDTMFOffTime

anonymous enum

Enumeration values: DIAL_TONE_TIMEOUT

enum OpalLineInterfaceDevice::AECLevels

Enumeration values: AECOff  AECLow  AECMedium  AECHigh  AECAuto  AECAGC  AECError

enum OpalLineInterfaceDevice::CallProgressTones

Enumeration values: NoTone  DialTone  RingTone  BusyTone  FastBusyTone  ClearTone  CNGTone  MwiTone  AllTones

enum OpalLineInterfaceDevice::T35CountryCodes

Enumeration values: Japan  Albania  Algeria  AmericanSamoa  Germany  Anguilla  AntiguaAndBarbuda  Argentina  Ascension  Australia  Austria  Bahamas  Bahrain  Bangladesh  Barbados  Belgium  Belize  Benin  Bermudas  Bhutan  Bolivia  Botswana  Brazil  BritishAntarcticTerritory  BritishIndianOceanTerritory  BritishVirginIslands  BruneiDarussalam  Bulgaria  Myanmar  Burundi  Byelorussia  Cameroon  Canada  CapeVerde  CaymanIslands  CentralAfricanRepublic  Chad  Chile  China  Colombia  Comoros  Congo  CookIslands  CostaRica  Cuba  Cyprus  Czechoslovakia  Cambodia  DemocraticPeoplesRepublicOfKorea  Denmark  Djibouti  DominicanRepublic  Dominica  Ecuador  Egypt  ElSalvador  EquatorialGuinea  Ethiopia  FalklandIslands  Fiji  Finland  France  FrenchPolynesia  FrenchSouthernAndAntarcticLands  Gabon  Gambia  Germany2  Angola  Ghana  Gibraltar  Greece  Grenada  Guam  Guatemala  Guernsey  Guinea  GuineaBissau  Guayana  Haiti  Honduras  Hongkong  Hungary  Iceland  India  Indonesia  Iran  Iraq  Ireland  Israel  Italy  CotedIvoire  Jamaica  Afghanistan  Jersey  Jordan  Kenya  Kiribati  KoreaRepublic  Kuwait  Lao  Lebanon  Lesotho  Liberia  Libya  Liechtenstein  Luxemborg  Macao  Madagascar  Malaysia  Malawi  Maldives  Mali  Malta  Mauritania  Mauritius  Mexico  Monaco  Mongolia  Montserrat  Morocco  Mozambique  Nauru  Nepal  Netherlands  NetherlandsAntilles  NewCaledonia  NewZealand  Nicaragua  Niger  Nigeria  Norway  Oman  Pakistan  Panama  PapuaNewGuinea  Paraguay  Peru  Philippines  Poland  Portugal  PuertoRico  Qatar  Romania  Rwanda  SaintKittsAndNevis  SaintCroix  SaintHelenaAndAscension  SaintLucia  SanMarino  SaintThomas  SaoTomeAndPrincipe  SaintVicentAndTheGrenadines  SaudiArabia  Senegal  Seychelles  SierraLeone  Singapore  SolomonIslands  Somalia  SouthAfrica  Spain  SriLanka  Sudan  Suriname  Swaziland  Sweden  Switzerland  Syria  Tanzania  Thailand  Togo  Tonga  TrinidadAndTobago  Tunisia  Turkey  TurksAndCaicosIslands  Tuvalu  Uganda  Ukraine  UnitedArabEmirates  UnitedKingdom  UnitedStates  BurkinaFaso  Uruguay  USSR  Vanuatu  VaticanCityState  Venezuela  VietNam  WallisAndFutuna  WesternSamoa  Yemen  Yemen2  Yugoslavia  Zaire  Zambia  Zimbabwe  NumCountryCodes  UnknownCountry

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Constructor & Destructor Documentation

OpalLineInterfaceDevice::OpalLineInterfaceDevice (    )

Construct a new line interface device.

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Member Function Documentation

virtual BOOL OpalLineInterfaceDevice::Close (    )  [virtual]

Close the line interface device.

OpalLineInterfaceDevice* OpalLineInterfaceDevice::Create (  const PString &    type, void *    parameters = NULL )  [static]

Create a new device from the registration string Parameters: type  Type of device to create parameters  Arbitrary parameters for the LID

virtual CallProgressTones OpalLineInterfaceDevice::DialOut (  unsigned    line, const PString &    number, BOOL    requireTones = FALSE, unsigned    uiDialDelay = 0 )  [virtual]

Dial a number on network line. The takes the line off hook, waits for dial tone, and transmits the specified number as DTMF tones. If the requireTones flag is TRUE the call is aborted of the call progress tones are not detected. Otherwise the call proceeds with short delays while it tries to detect the call progress tones. The return code indicates the following: DialTone No dial tone detected RingTone Dial was successful BusyTone The remote phone was busy ClearTone Dial failed (usually means rang out) NoTone There was an internal error making the call Parameters: line  Number of line number  Number to dial requireTones  Require dial/ring tone to be detected uiDialDelay  time in msec to wait between the dial tone detection and dialing the dtmf

BOOL OpalLineInterfaceDevice::DisableAudio (  unsigned    line )  [inline]

Disable audio for the line. Parameters: line  Number of line

virtual BOOL OpalLineInterfaceDevice::EnableAudio (  unsigned    line, BOOL    enable = TRUE )  [virtual]

Enable audio for the line. Parameters: line  Number of line

virtual AECLevels OpalLineInterfaceDevice::GetAEC (  unsigned    line )  [virtual]

Get acoustic echo cancellation. Note, not all devices may support this function. Parameters: line  Number of line

PStringList OpalLineInterfaceDevice::GetAllDevices (    )  [static]

Return an array of all the LID types registered and all of the possible devices each one can open. Each string will be of the form "type: name" eg "Quicknet: 3211FFFF"

virtual PStringArray OpalLineInterfaceDevice::GetAllNames (    )  [pure virtual]

Get all the possible devices that can be opened.

PStringList OpalLineInterfaceDevice::GetAllTypes (    )  [static]

Return an array of all the LID types registered.

virtual unsigned OpalLineInterfaceDevice::GetAverageSignalLevel (  unsigned    line, BOOL    playback )  [virtual]

Get average signal level in last frame. Parameters: line  Number of line playback  Get average playback or record level.

virtual BOOL OpalLineInterfaceDevice::GetCallerID (  unsigned    line, PString &    idString, BOOL    full = FALSE )  [virtual]

Get Caller ID from the last incoming ring. The idString parameter is either simply the "number" field of the caller ID data, or if full is TRUE, all of the fields in the caller ID data. The full data of the caller ID string consists of the number field, the time/date and the name field separated by tabs ('\t'). Parameters: line  Number of line idString  ID string returned full  Get full information in idString

unsigned int OpalLineInterfaceDevice::getCardNumber (    )  const [inline, protected]

T35CountryCodes OpalLineInterfaceDevice::GetCountryCode (  const PString &    name )  [static]

T35CountryCodes OpalLineInterfaceDevice::GetCountryCode (    )  const [inline]

Get the country code set for the device.

PString OpalLineInterfaceDevice::GetCountryCodeName (  T35CountryCodes    code )  [static]

Get the country code set for the device as a string.

PString OpalLineInterfaceDevice::GetCountryCodeName (    )

Get the country code set for the device as a string.

virtual PStringList OpalLineInterfaceDevice::GetCountryCodeNameList (    )  [virtual]

Get the list of countries actually supported by the device

virtual PString OpalLineInterfaceDevice::GetDescription (    )  [pure virtual]

Get the description of the line interface device. This is a string indication of the card type for user interface display purposes or device specific control. The device should be as detailed as possible eg "Quicknet LineJACK".

virtual PString OpalLineInterfaceDevice::GetDeviceName (    )  [pure virtual]

Get the device name, as used to open the device. Note the format of this name should be as is returned from GetAllName() and must be able to be used in a subsequent Open() call.

virtual PString OpalLineInterfaceDevice::GetDeviceType (    )  [pure virtual]

Get the device type identifier. This is as is used in the factory registration.

unsigned int OpalLineInterfaceDevice::getDialToneTimeout (    )  const [inline, protected]

int OpalLineInterfaceDevice::GetErrorNumber (    )  const [inline]

Return number for last error.

PString OpalLineInterfaceDevice::GetErrorText (    )

Return text for last error.

virtual unsigned OpalLineInterfaceDevice::GetLineCount (    )  [pure virtual]

Get the total number of lines supported by this device.

virtual OpalMediaFormatList OpalLineInterfaceDevice::GetMediaFormats (    )  [pure virtual]

Get the media formats this device is capable of using.

int OpalLineInterfaceDevice::getOsError (    )  const [inline, protected]

int OpalLineInterfaceDevice::getOsHandle (    )  const [inline, protected]

virtual BOOL OpalLineInterfaceDevice::GetPlayVolume (  unsigned    line, unsigned &    volume )  [virtual]

Set volume level for playing. A value of 100 is the maximum volume possible for the hardware. A value of 0 is the minimum volume possible for the hardware. Parameters: line  Number of line volume  Volume level from 0 to 100%

const PBYTEArray& OpalLineInterfaceDevice::getReadDeblockingBuffer (    )  [inline, protected]

PINDEX OpalLineInterfaceDevice::getReadDeblockingOffset (    )  const [inline, protected]

virtual OpalMediaFormat OpalLineInterfaceDevice::GetReadFormat (  unsigned    line )  [pure virtual]

Get the media format (codec) for reading on the specified line. Parameters: line  Number of line

virtual PINDEX OpalLineInterfaceDevice::GetReadFrameSize (  unsigned    line )  [pure virtual]

Get the read frame size in bytes. All calls to ReadFrame() will return this number of bytes. Parameters: line  Number of line

virtual BOOL OpalLineInterfaceDevice::GetRecordVolume (  unsigned    line, unsigned &    volume )  [virtual]

Get volume level for recording. A value of 100 is the maximum volume possible for the hardware. A value of 0 is the minimum volume possible for the hardware. Parameters: line  Number of line volume  Volume level from 0 to 100%

virtual BOOL OpalLineInterfaceDevice::GetRemoveDTMF (  unsigned    line )  [virtual]

Get DTMF removal mode. When set in this mode the DTMF tones detected are removed from the encoded data stream as returned by ReadFrame(). Parameters: line  Number of line

virtual BOOL OpalLineInterfaceDevice::GetVAD (  unsigned    line )  [virtual]

Get voice activity detection. Note, not all devices, or selected codecs, may support this function. Parameters: line  Number of line

virtual unsigned OpalLineInterfaceDevice::GetWinkDuration (  unsigned    line )  [virtual]

Get wink detect minimum duration. This is the signal used by telcos to end PSTN call. Parameters: line  Number of line

const PBYTEArray& OpalLineInterfaceDevice::getWriteDeblockingBuffer (    )  [inline, protected]

PINDEX OpalLineInterfaceDevice::getWriteDeblockingOffset (    )  const [inline, protected]

virtual OpalMediaFormat OpalLineInterfaceDevice::GetWriteFormat (  unsigned    line )  [pure virtual]

Get the media format (codec) for writing on the specified line. Parameters: line  Number of line

virtual PINDEX OpalLineInterfaceDevice::GetWriteFrameSize (  unsigned    line )  [pure virtual]

Get the write frame size in bytes. All calls to WriteFrame() must be this number of bytes. Parameters: line  Number of line

virtual BOOL OpalLineInterfaceDevice::HasHookFlash (  unsigned    line )  [virtual]

Return TRUE if a hook flash has been detected

virtual BOOL OpalLineInterfaceDevice::HookFlash (  unsigned    line, unsigned    flashTime = 200 )  [virtual]

Set the hook state off then straight back on again. This will only operate if the line is currently off hook. Parameters: line  Number of line flashTime  Time for hook flash in milliseconds

virtual BOOL OpalLineInterfaceDevice::IsAudioEnabled (  unsigned    line )  [virtual]

Determine if audio for the line is enabled. Parameters: line  Number of line

virtual BOOL OpalLineInterfaceDevice::IsLineDisconnected (  unsigned    line, BOOL    checkForWink = TRUE )  [virtual]

Determine if line has been disconnected from a call. This uses the hardware (and country) dependent means for determining if the remote end of a PSTN connection has hung up. For a POTS port this is equivalent to !IsLineOffHook(). Parameters: line  Number of line

virtual BOOL OpalLineInterfaceDevice::IsLineOffHook (  unsigned    line )  [pure virtual]

Determine if line is currently off hook. This function implies that the state is debounced and that a return value of TRUE indicates that the phone is really off hook. That is hook flashes and winks are masked out. Parameters: line  Number of line

virtual BOOL OpalLineInterfaceDevice::IsLinePresent (  unsigned    line, BOOL    force = FALSE )  [virtual]

Determine if a physical line is present on the logical line. Parameters: line  Number of line force  Force test, do not optimise

virtual BOOL OpalLineInterfaceDevice::IsLineRinging (  unsigned    line, DWORD *    cadence = NULL )  [virtual]

Determine if line is ringing. This function implies that the state is "debounced" and that a return value of TRUE indicates that the phone is still ringing and it is not simply a pause in the ring cadence. If cadence is not NULL then it is set with the bit pattern for the incoming ringing. Note that in this case the funtion may take a full sequence to return. If it is NULL it can be assumed that the function will return quickly. Parameters: line  Number of line cadence  Cadence of incoming ring

virtual BOOL OpalLineInterfaceDevice::IsLineTerminal (  unsigned    line )  [virtual]

Get the type of the line. A "terminal" line is one where a call may terminate. For example a POTS line with a standard telephone handset on it would be a terminal line. The alternative is a "network" line, that is one connected to switched network eg the standard PSTN. Parameters: line  Number of line

virtual BOOL OpalLineInterfaceDevice::IsLineToLineDirect (  unsigned    line1, unsigned    line2 )  [virtual]

Determine if the two lines are directly connected. Parameters: line1  Number of first line line2  Number of second line

virtual BOOL OpalLineInterfaceDevice::IsOpen (    )  [virtual]

Determine if the line interface device is open.

virtual CallProgressTones OpalLineInterfaceDevice::IsToneDetected (  unsigned    line )  [virtual]

See if any tone is detected. Parameters: line  Number of line

virtual BOOL OpalLineInterfaceDevice::IsTonePlaying (  unsigned    line )  [virtual]

Determine if a tone is still playing Parameters: line  Number of line

virtual BOOL OpalLineInterfaceDevice::Open (  const PString &    device )  [pure virtual]

Open the line interface device. Parameters: device