Q931 Class Reference

#include <q931.h>

List of all members.

Public Types

enum  MsgTypes {
  NationalEscapeMsg = 0x00, AlertingMsg = 0x01, CallProceedingMsg = 0x02, ConnectMsg = 0x07,
  ConnectAckMsg = 0x0f, ProgressMsg = 0x03, SetupMsg = 0x05, SetupAckMsg = 0x0d,
  ResumeMsg = 0x26, ResumeAckMsg = 0x2e, ResumeRejectMsg = 0x22, SuspendMsg = 0x25,
  SuspendAckMsg = 0x2d, SuspendRejectMsg = 0x21, UserInformationMsg = 0x20, DisconnectMsg = 0x45,
  ReleaseMsg = 0x4d, ReleaseCompleteMsg = 0x5a, RestartMsg = 0x46, RestartAckMsg = 0x4e,
  SegmentMsg = 0x60, CongestionCtrlMsg = 0x79, InformationMsg = 0x7b, NotifyMsg = 0x6e,
  StatusMsg = 0x7d, StatusEnquiryMsg = 0x75, FacilityMsg = 0x62
}
enum  InformationElementCodes {
  BearerCapabilityIE = 0x04, CauseIE = 0x08, ChannelIdentificationIE = 0x18, FacilityIE = 0x1c,
  ProgressIndicatorIE = 0x1e, CallStateIE = 0x14, DisplayIE = 0x28, KeypadIE = 0x2c,
  SignalIE = 0x34, ConnectedNumberIE = 0x4c, CallingPartyNumberIE = 0x6c, CalledPartyNumberIE = 0x70,
  RedirectingNumberIE = 0x74, UserUserIE = 0x7e
}
enum  InformationTransferCapability {
  TransferSpeech, TransferUnrestrictedDigital = 8, TransferRestrictedDigital = 9, Transfer3_1kHzAudio = 16,
  TransferUnrestrictedDigitalWithTones = 17, TransferVideo = 24
}
enum  CauseValues {
  UnknownCauseIE = 0, UnallocatedNumber = 1, NoRouteToNetwork = 2, NoRouteToDestination = 3,
  SendSpecialTone = 4, MisdialledTrunkPrefix = 5, ChannelUnacceptable = 6, CallAwarded = 7,
  Preemption = 8, PreemptionCircuitReserved = 9, NormalCallClearing = 16, UserBusy = 17,
  NoResponse = 18, NoAnswer = 19, SubscriberAbsent = 20, CallRejected = 21,
  NumberChanged = 22, Redirection = 23, ExchangeRoutingError = 25, NonSelectedUserClearing = 26,
  DestinationOutOfOrder = 27, InvalidNumberFormat = 28, FacilityRejected = 29, StatusEnquiryResponse = 30,
  NormalUnspecified = 31, NoCircuitChannelAvailable = 34, CallQueued = 35, NetworkOutOfOrder = 38,
  FrameModeOOS = 39, FrameModeOperational = 40, TemporaryFailure = 41, Congestion = 42,
  AccessInformationDiscarded = 43, RequestedCircuitNotAvailable = 44, PrecedenceCallBlocked = 46, ResourceUnavailable = 47,
  QoSNotAvailable = 49, RequestedFacilityNotSubscribed = 50, OutgoingCallsBarred = 52, OutgoingCallsBarredInCUG = 53,
  IncomingCallsBarred = 54, IncomingCallsBarredInCUG = 55, BearerCapNotAuthorised = 57, BearerCapNotPresentlyAvailable = 58,
  InconsistentOutgoingIE = 62, ServiceOptionNotAvailable = 63, BearerCapNotImplemented = 65, ChannelTypeNotImplemented = 66,
  RequestedFacilityNotImplemented = 69, OnlyRestrictedDigitalBearerCapAvailable = 70, ServiceOrOptionNotImplemented = 79, InvalidCallReference = 81,
  IdentifiedChannelNonExistent = 82, CallIdentifyNotSuspendedCall = 83, CallIdentifyInUse = 84, NoCallSuspended = 85,
  ClearedRequestedCallIdentity = 86, UserNotInCUG = 87, IncompatibleDestination = 88, NonexistentCUG = 90,
  InvalidTransitNetwork = 91, InvalidMessageUnspecified = 95, MandatoryIEMissing = 96, MessageTypeNonexistent = 97,
  MessageNotCompatible = 98, IENonExistantOrNotImplemented = 99, InvalidIEContents = 100, MessageNotCompatibleWithCallState = 101,
  TimerExpiry = 102, ParameterNonexistent = 103, UnrecognisedParamaterDiscarded = 110, ProtocolErrorUnspecified = 111,
  InterworkingUnspecified = 127, ErrorInCauseIE = 0x100
}
enum  CallStates {
  CallState_Null = 0, CallState_CallInitiated = 1, CallState_OverlapSending = 2, CallState_OutgoingCallProceeding = 3,
  CallState_CallDelivered = 4, CallState_CallPresent = 6, CallState_CallReceived = 7, CallState_ConnectRequest = 8,
  CallState_IncomingCallProceeding = 9, CallState_Active = 10, CallState_DisconnectRequest = 11, CallState_DisconnectIndication = 12,
  CallState_SuspendRequest = 15, CallState_ResumeRequest = 17, CallState_ReleaseRequest = 19, CallState_OverlapReceiving = 25,
  CallState_ErrorInIE = 0x100
}
enum  SignalInfo {
  SignalDialToneOn, SignalRingBackToneOn, SignalInterceptToneOn, SignalNetworkCongestionToneOn,
  SignalBusyToneOn, SignalConfirmToneOn, SignalAnswerToneOn, SignalCallWaitingTone,
  SignalOffhookWarningTone, SignalPreemptionToneOn, SignalTonesOff = 0x3f, SignalAlertingPattern0 = 0x40,
  SignalAlertingPattern1, SignalAlertingPattern2, SignalAlertingPattern3, SignalAlertingPattern4,
  SignalAlertingPattern5, SignalAlertingPattern6, SignalAlertingPattern7, SignalAlertingOff = 0x4f,
  SignalErrorInIE = 0x100
}
enum  ProgressIndication {
  ProgressNotEndToEndISDN = 1, ProgressDestinationNonISDN = 2, ProgressOriginNotISDN = 3, ProgressReturnedToISDN = 4,
  ProgressServiceChange = 5, ProgressInbandInformationAvailable = 8
}
enum  NumberingPlanCodes {
  UnknownPlan = 0x00, ISDNPlan = 0x01, DataPlan = 0x03, TelexPlan = 0x04,
  NationalStandardPlan = 0x08, PrivatePlan = 0x09, ReservedPlan = 0x0f
}
enum  TypeOfNumberCodes {
  UnknownType = 0x00, InternationalType = 0x01, NationalType = 0x02, NetworkSpecificType = 0x03,
  SubscriberType = 0x04, AbbreviatedType = 0x06, ReservedType = 0x07
}

Public Member Functions

 Q931 ()
 Q931 (const Q931 &other)
Q931 & operator= (const Q931 &other)
void BuildFacility (int callRef, BOOL fromDest)
void BuildInformation (int callRef, BOOL fromDest)
void BuildProgress (int callRef, BOOL fromDest, unsigned description, unsigned codingStandard=0, unsigned location=0)
void BuildNotify (int callRef, BOOL fromDest)
void BuildCallProceeding (int callRef)
void BuildSetupAcknowledge (int callRef)
void BuildAlerting (int callRef)
void BuildSetup (int callRef=-1)
void BuildConnect (int callRef)
void BuildConnectAck (int callRef, BOOL fromDest)
void BuildStatus (int callRef, BOOL fromDest)
void BuildStatusEnquiry (int callRef, BOOL fromDest)
void BuildReleaseComplete (int callRef, BOOL fromDest)
BOOL Decode (const PBYTEArray &data)
BOOL Encode (PBYTEArray &data) const
void PrintOn (ostream &strm) const
PString GetMessageTypeName () const
unsigned GetCallReference () const
BOOL IsFromDestination () const
MsgTypes GetMessageType () const
BOOL HasIE (InformationElementCodes ie) const
PBYTEArray GetIE (InformationElementCodes ie) const
void SetIE (InformationElementCodes ie, const PBYTEArray &userData)
void RemoveIE (InformationElementCodes ie)
void SetBearerCapabilities (InformationTransferCapability capability, unsigned transferRate, unsigned codingStandard=0, unsigned userInfoLayer1=5)
BOOL GetBearerCapabilities (InformationTransferCapability &capability, unsigned &transferRate, unsigned *codingStandard=NULL, unsigned *userInfoLayer1=NULL)
void SetCause (CauseValues value, unsigned standard=0, unsigned location=0)
CauseValues GetCause (unsigned *standard=NULL, unsigned *location=NULL) const
void SetCallState (CallStates value, unsigned standard=0)
CallStates GetCallState (unsigned *standard=NULL) const
void SetSignalInfo (SignalInfo value)
SignalInfo GetSignalInfo () const
void SetKeypad (const PString &digits)
PString GetKeypad () const
void SetProgressIndicator (unsigned description, unsigned codingStandard=0, unsigned location=0)
BOOL GetProgressIndicator (unsigned &description, unsigned *codingStandard=NULL, unsigned *location=NULL) const
void SetDisplayName (const PString &name)
PString GetDisplayName () const
void SetCallingPartyNumber (const PString &number, unsigned plan=1, unsigned type=0, int presentation=-1, int screening=-1)
BOOL GetCallingPartyNumber (PString &number, unsigned *plan=NULL, unsigned *type=NULL, unsigned *presentation=NULL, unsigned *screening=NULL, unsigned defPresentation=0, unsigned defScreening=0) const
void SetCalledPartyNumber (const PString &number, unsigned plan=1, unsigned type=0)
BOOL GetCalledPartyNumber (PString &number, unsigned *plan=NULL, unsigned *type=NULL) const
void SetRedirectingNumber (const PString &number, unsigned plan=1, unsigned type=0, int presentation=-1, int screening=-1, int reason=-1)
BOOL GetRedirectingNumber (PString &number, unsigned *plan=NULL, unsigned *type=NULL, unsigned *presentation=NULL, unsigned *screening=NULL, unsigned *reason=NULL, unsigned defPresentation=0, unsigned defScreening=0, unsigned defReason=0) const
void SetConnectedNumber (const PString &number, unsigned plan=1, unsigned type=0, int presentation=-1, int screening=-1, int reason=-1)
BOOL GetConnectedNumber (PString &number, unsigned *plan=NULL, unsigned *type=NULL, unsigned *presentation=NULL, unsigned *screening=NULL, unsigned *reason=NULL, unsigned defPresentation=0, unsigned defScreening=0, unsigned defReason=0) const
void SetChannelIdentification (unsigned interfaceType=0, unsigned preferredOrExclusive=0, int channelNumber=1)
BOOL GetChannelIdentification (unsigned *interfaceType=NULL, unsigned *preferredOrExclusive=NULL, int *channelNumber=NULL) const

Static Public Member Functions

static unsigned GenerateCallReference ()

Protected Attributes

unsigned callReference
BOOL fromDestination
unsigned protocolDiscriminator
MsgTypes messageType
InternalInformationElements informationElements

Friends

ostream & operator<< (ostream &strm, InformationElementCodes ie)
ostream & operator<< (ostream &strm, CauseValues cause)

Detailed Description

This class embodies a Q.931 Protocol Data Unit.

Definition at line 223 of file q931.h.

Member Enumeration Documentation

enum Q931::MsgTypes

Enumerator:
NationalEscapeMsg 
AlertingMsg 
CallProceedingMsg 
ConnectMsg 
ConnectAckMsg 
ProgressMsg 
SetupMsg 
SetupAckMsg 
ResumeMsg 
ResumeAckMsg 
ResumeRejectMsg 
SuspendMsg 
SuspendAckMsg 
SuspendRejectMsg 
UserInformationMsg 
DisconnectMsg 
ReleaseMsg 
ReleaseCompleteMsg 
RestartMsg 
RestartAckMsg 
SegmentMsg 
CongestionCtrlMsg 
InformationMsg 
NotifyMsg 
StatusMsg 
StatusEnquiryMsg 
FacilityMsg 

Definition at line 227 of file q931.h.

enum Q931::InformationElementCodes

Enumerator:
BearerCapabilityIE 
CauseIE 
ChannelIdentificationIE 
FacilityIE 
ProgressIndicatorIE 
CallStateIE 
DisplayIE 
KeypadIE 
SignalIE 
ConnectedNumberIE 
CallingPartyNumberIE 
CalledPartyNumberIE 
RedirectingNumberIE 
UserUserIE 

Definition at line 292 of file q931.h.

enum Q931::InformationTransferCapability

Enumerator:
TransferSpeech 
TransferUnrestrictedDigital 
TransferRestrictedDigital 
Transfer3_1kHzAudio 
TransferUnrestrictedDigitalWithTones 
TransferVideo 

Definition at line 315 of file q931.h.

enum Q931::CauseValues

Enumerator:
UnknownCauseIE 
UnallocatedNumber 
NoRouteToNetwork 
NoRouteToDestination 
SendSpecialTone 
MisdialledTrunkPrefix 
ChannelUnacceptable 
CallAwarded 
Preemption 
PreemptionCircuitReserved 
NormalCallClearing 
UserBusy 
NoResponse 
NoAnswer 
SubscriberAbsent 
CallRejected 
NumberChanged 
Redirection 
ExchangeRoutingError 
NonSelectedUserClearing 
DestinationOutOfOrder 
InvalidNumberFormat 
FacilityRejected 
StatusEnquiryResponse 
NormalUnspecified 
NoCircuitChannelAvailable 
CallQueued 
NetworkOutOfOrder 
FrameModeOOS 
FrameModeOperational 
TemporaryFailure 
Congestion 
AccessInformationDiscarded 
RequestedCircuitNotAvailable 
PrecedenceCallBlocked 
ResourceUnavailable 
QoSNotAvailable 
RequestedFacilityNotSubscribed 
OutgoingCallsBarred 
OutgoingCallsBarredInCUG 
IncomingCallsBarred 
IncomingCallsBarredInCUG 
BearerCapNotAuthorised 
BearerCapNotPresentlyAvailable 
InconsistentOutgoingIE 
ServiceOptionNotAvailable 
BearerCapNotImplemented 
ChannelTypeNotImplemented 
RequestedFacilityNotImplemented 
OnlyRestrictedDigitalBearerCapAvailable 
ServiceOrOptionNotImplemented 
InvalidCallReference 
IdentifiedChannelNonExistent 
CallIdentifyNotSuspendedCall 
CallIdentifyInUse 
NoCallSuspended 
ClearedRequestedCallIdentity 
UserNotInCUG 
IncompatibleDestination 
NonexistentCUG 
InvalidTransitNetwork 
InvalidMessageUnspecified 
MandatoryIEMissing 
MessageTypeNonexistent 
MessageNotCompatible 
IENonExistantOrNotImplemented 
InvalidIEContents 
MessageNotCompatibleWithCallState 
TimerExpiry 
ParameterNonexistent 
UnrecognisedParamaterDiscarded 
ProtocolErrorUnspecified 
InterworkingUnspecified 
ErrorInCauseIE 

Definition at line 338 of file q931.h.

enum Q931::CallStates

Enumerator:
CallState_Null 
CallState_CallInitiated 
CallState_OverlapSending 
CallState_OutgoingCallProceeding 
CallState_CallDelivered 
CallState_CallPresent 
CallState_CallReceived 
CallState_ConnectRequest 
CallState_IncomingCallProceeding 
CallState_Active 
CallState_DisconnectRequest 
CallState_DisconnectIndication 
CallState_SuspendRequest 
CallState_ResumeRequest 
CallState_ReleaseRequest 
CallState_OverlapReceiving 
CallState_ErrorInIE 

Definition at line 426 of file q931.h.

enum Q931::SignalInfo

Enumerator:
SignalDialToneOn 
SignalRingBackToneOn 
SignalInterceptToneOn 
SignalNetworkCongestionToneOn 
SignalBusyToneOn 
SignalConfirmToneOn 
SignalAnswerToneOn 
SignalCallWaitingTone 
SignalOffhookWarningTone 
SignalPreemptionToneOn 
SignalTonesOff 
SignalAlertingPattern0 
SignalAlertingPattern1 
SignalAlertingPattern2 
SignalAlertingPattern3 
SignalAlertingPattern4 
SignalAlertingPattern5 
SignalAlertingPattern6 
SignalAlertingPattern7 
SignalAlertingOff 
SignalErrorInIE 

Definition at line 453 of file q931.h.

enum Q931::ProgressIndication

Enumerator:
ProgressNotEndToEndISDN 
ProgressDestinationNonISDN 
ProgressOriginNotISDN 
ProgressReturnedToISDN 
ProgressServiceChange 
ProgressInbandInformationAvailable 

Definition at line 482 of file q931.h.

enum Q931::NumberingPlanCodes

Enumerator:
UnknownPlan 
ISDNPlan 
DataPlan 
TelexPlan 
NationalStandardPlan 
PrivatePlan 
ReservedPlan 

Definition at line 507 of file q931.h.

enum Q931::TypeOfNumberCodes

Enumerator:
UnknownType 
InternationalType 
NationalType 
NetworkSpecificType 
SubscriberType 
AbbreviatedType 
ReservedType 

Definition at line 517 of file q931.h.

Member Function Documentation

void Q931::SetBearerCapabilities ( InformationTransferCapability  capability,
unsigned  transferRate,
unsigned  codingStandard = 0,
unsigned  userInfoLayer1 = 5 
)

Parameters:
transferRate  Number of 64k B channels
codingStandard  0 = ITU-T standardized coding
userInfoLayer1  5 = Recommendations H.221 and H.242

Definition at line 808 of file q931.cxx.

References BearerCapabilityIE, and SetIE().

Referenced by BuildConnect(), BuildSetup(), and H323Connection::SendSignalSetup().

BOOL Q931::GetBearerCapabilities ( InformationTransferCapability &  capability,
unsigned &  transferRate,
unsigned *  codingStandard = NULL,
unsigned *  userInfoLayer1 = NULL 
)

Parameters:
transferRate  Number of 64k B channels

Definition at line 862 of file q931.cxx.

References BearerCapabilityIE, GetIE(), and HasIE().

void Q931::SetCause ( CauseValues  value,
unsigned  standard = 0,
unsigned  location = 0 
)

Parameters:
standard  0 = ITU-T standardized coding
location  0 = User

Definition at line 912 of file q931.cxx.

References CauseIE, and SetIE().

Referenced by H323SignalPDU::BuildReleaseComplete(), BuildStatus(), and H323Transport::HandleFirstSignallingChannelPDU().

Q931::CauseValues Q931::GetCause ( unsigned *  standard = NULL,
unsigned *  location = NULL 
) const

Parameters:
standard  0 = ITU-T standardized coding
location  0 = User

Definition at line 921 of file q931.cxx.

References CauseIE, ErrorInCauseIE, GetIE(), and HasIE().

Referenced by H323Connection::OnReceivedReleaseComplete().

void Q931::SetCallState ( CallStates  value,
unsigned  standard = 0 
)

Parameters:
standard  0 = ITU-T standardized coding

Definition at line 946 of file q931.cxx.

References CallState_ErrorInIE, CallStateIE, and SetIE().

Referenced by BuildStatus().

Q931::CallStates Q931::GetCallState ( unsigned *  standard = NULL  )  const

Parameters:
standard  0 = ITU-T standardized coding

Definition at line 958 of file q931.cxx.

References CallState_ErrorInIE, CallStateIE, GetIE(), and HasIE().

void Q931::SetCallingPartyNumber ( const PString &  number,
unsigned  plan = 1,
unsigned  type = 0,
int  presentation = -1,
int  screening = -1 
)

Parameters:
number  Number string
plan  1 = ISDN/Telephony numbering system
type  0 = Unknown number type
presentation  0 = presentation allowed, -1 = no octet3a
screening  0 = user provided, not screened

Definition at line 1186 of file q931.cxx.

References CallingPartyNumberIE, and SetIE().

Referenced by H323SignalPDU::SetQ931Fields().

BOOL Q931::GetCallingPartyNumber ( PString &  number,
unsigned *  plan = NULL,
unsigned *  type = NULL,
unsigned *  presentation = NULL,
unsigned *  screening = NULL,
unsigned  defPresentation = 0,
unsigned  defScreening = 0 
) const

Parameters:
number  Number string
plan  ISDN/Telephony numbering system
type  Number type
presentation  Presentation indicator
screening  Screening indicator
defPresentation  Default value if octet3a not present
defScreening  Default value if octet3a not present

Definition at line 1197 of file q931.cxx.

References CallingPartyNumberIE, and GetIE().

Referenced by H323Connection::OnReceivedSignalSetup().

void Q931::SetCalledPartyNumber ( const PString &  number,
unsigned  plan = 1,
unsigned  type = 0 
)

Parameters:
number  Number string
plan  1 = ISDN/Telephony numbering system
type  0 = Unknown number type

Definition at line 1211 of file q931.cxx.

References CalledPartyNumberIE, and SetIE().

Referenced by H323SignalPDU::BuildSetup(), H323Connection::SendMoreDigits(), and H323SignalPDU::SetQ931Fields().

BOOL Q931::GetCalledPartyNumber ( PString &  number,
unsigned *  plan = NULL,
unsigned *  type = NULL 
) const

Parameters:
number  Number string
plan  ISDN/Telephony numbering system
type  Number type

Definition at line 1218 of file q931.cxx.

References CalledPartyNumberIE, and GetIE().

Referenced by H323Connection::SendSignalSetup(), and H323Connection::SetRemotePartyInfo().

void Q931::SetRedirectingNumber ( const PString &  number,
unsigned  plan = 1,
unsigned  type = 0,
int  presentation = -1,
int  screening = -1,
int  reason = -1 
)

Parameters:
number  Number string
plan  1 = ISDN/Telephony numbering system
type  0 = Unknown number type
presentation  0 = presentation allowed, -1 = no octet3a
screening  0 = user provided, not screened
reason  0 = Unknown reason , -1 = no octet 3b

Definition at line 1225 of file q931.cxx.

References RedirectingNumberIE, and SetIE().

BOOL Q931::GetRedirectingNumber ( PString &  number,
unsigned *  plan = NULL,
unsigned *  type = NULL,
unsigned *  presentation = NULL,
unsigned *  screening = NULL,
unsigned *  reason = NULL,
unsigned  defPresentation = 0,
unsigned  defScreening = 0,
unsigned  defReason = 0 
) const

Parameters:
number  Number string
plan  ISDN/Telephony numbering system
type  Number type
presentation  Presentation indicator
screening  Screening indicator
reason  Reason for redirection
defPresentation  Default value if octet3a not present
defScreening  Default value if octet3a not present
defReason  Default value if octet 3b not present

Definition at line 1237 of file q931.cxx.

References GetIE(), and RedirectingNumberIE.

void Q931::SetConnectedNumber ( const PString &  number,
unsigned  plan = 1,
unsigned  type = 0,
int  presentation = -1,
int  screening = -1,
int  reason = -1 
)

Parameters:
number  Number string
plan  1 = ISDN/Telephony numbering system
type  0 = Unknown number type
presentation  0 = presentation allowed, -1 = no octet3a
screening  0 = user provided, not screened
reason  0 = Unknown reason , -1 = no octet 3b

Definition at line 1269 of file q931.cxx.

References ConnectedNumberIE, and SetIE().

BOOL Q931::GetConnectedNumber ( PString &  number,
unsigned *  plan = NULL,
unsigned *  type = NULL,
unsigned *  presentation = NULL,
unsigned *  screening = NULL,
unsigned *  reason = NULL,
unsigned  defPresentation = 0,
unsigned  defScreening = 0,
unsigned  defReason = 0 
) const

Parameters:
number  Number string
plan  ISDN/Telephony numbering system
type  Number type
presentation  Presentation indicator
screening  Screening indicator
reason  Reason for redirection
defPresentation  Default value if octet3a not present
defScreening  Default value if octet3a not present
defReason  Default value if octet 3b not present

Definition at line 1253 of file q931.cxx.

References ConnectedNumberIE, and GetIE().

void Q931::SetChannelIdentification ( unsigned  interfaceType = 0,
unsigned  preferredOrExclusive = 0,
int  channelNumber = 1 
)

Set the limitations to ChannelIdentification.

Parameters:
interfaceType  0 = basic, 1 = other (e.g. primary)
preferredOrExclusive  0 = preferred, 1 = exclusive
channelNumber  -1 = any, 0 = none/D, 1 = channel 1/B1, etc. 1-15,17-31

Definition at line 1281 of file q931.cxx.

References ChannelIdentificationIE, and SetIE().

BOOL Q931::GetChannelIdentification ( unsigned *  interfaceType = NULL,
unsigned *  preferredOrExclusive = NULL,
int *  channelNumber = NULL 
) const

Get the limitations to ChannelIdentification.

Parameters:
interfaceType  Interface type
preferredOrExclusive  Channel negotiation preference
channelNumber  Channel number

Definition at line 1330 of file q931.cxx.

References ChannelIdentificationIE, GetIE(), and HasIE().

The documentation for this class was generated from the following files:
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