Specifying ISDN Keys and Values for an ISDN Adapter

In addition to a WanEndpoints value, an INF file for an ISDN adapter must add (through an add-registry-section) the following keys and values to the instance key for the adapter. For more information, see Specifying WAN Endpoints for a WAN Adapter.

Note ISDN drivers are deprecated in Windows 8.1, Windows Server 2012 R2, and later.

• IsdnNumDChannels

  Specifies the number of D-channels that are supported by the ISDN adapter.

• IsdnAutoSwitchDetect (Optional)

  Specifies whether the ISDN adapter supports automatic switch detection. A value of 1 indicates that the adapter supports automatic switch detection. A value of zero indicates that the adapter does not support automatic switch detection.

• IsdnSwitchTypes

  Specifies the switch types that are supported by the ISDN adapter.

  Switch	Description
  ISDN_SWITCH_AUTO	Auto Detect (North America only)
  ISDN_SWITCH_ATT	ESS5 (AT&T, North America)
  ISDN_SWITCH_NI1	National ISDN 1 (NI-1)
  ISDN_SWITCH_NI2	National ISDN 2 (NI-2)
  ISDN_SWITCH_NT1	Northern Telecom DMS 100 (NT-1)
  ISDN_SWITCH_INS64	NTT INS64 (Japan)
  ISDN_SWITCH_1TR6	German National (1TR6). This switch type is rarely used.
  ISDN_SWITCH_VN3	French National (VN3). This switch type is rarely used.
  ISDN_SWITCH_NET3	European ISDN (DSS1)
  ISDN_SWITCH_DSS1	European ISDN (DSS1)
  ISDN_SWITCH_AUS	Australian National. This switch type is rarely used.
  ISDN_SWITCH_BEL	Belgium National. This switch type is rarely used.
  ISDN_SWITCH_VN4	French National (VN4)
  ISDN_SWITCH_SWE	Swedish National
  ISDN_SWITCH_ITA	Italian National
  ISDN_SWITCH_TWN	Taiwanese

To specify multiple switch types, simply add the individual switch type values together.

The ISDN Wizard, which runs automatically during the installation of an ISDN component, allows the user to select one of the switch types specified by IsdnSwitchTypes. The selected switch type determines which other ISDN parameters the ISDN Wizard subsequently displays for configuration. These ISDN parameters include the phone number, the SPID (service profile identifier), the subaddress, and the multisubscriber number.

• An IsdnNumBChannels value and a D-channel key for each D-channel

  The D-channel key is an zero-based index from 0 through 9 that identifies the D-channel. IsdnNumBChannels is a REG_DWORD value added to the D-channel key. IsdnNumBChannels specifies the number of B-channels supported by the D-channel.

The following is an example of an add-registry-section that adds ISDN keys and values to the instance key of an ISDN adapter. Two D-channels are specified for the adapter, and two B-channels are specified for each D-channel.

[ISDNadapter.reg]
HKR,,  WanEndPoints,         0x00010001, 4
HKR,,  IsdnNumDChannels,     0x00010001, 2
HKR,,  IsdnAutoSwitchDetect, 0x00010001, 1
HKR,,  IsdnSwitchTypes,      0x00010001, 0x00000004  ;NI1

HKR, 0, IsdnNumBChannels,    0x00010001, 2

HKR, 1, IsdnNumBChannels,    0x00010001, 2

The ISDN Wizard itself also adds ISDN keys and values to the instance key for an ISDN adapter, based on the parameter values specified by the user. The ISDN Wizard adds the following keys and values:

• IsdnSwitchType

  A REG_DWORD that indicates the switch type that was selected by the user for the ISDN adapter.

• IsdnMultiSubscriberNumbers value for each D-channel

  A REG_MULTI_SZ value that indicates the multisubscriber numbers that were specified by the user for the D-channel.

• A B-channel key and an IsdnSpid, IsdnPhoneNumber, and/or an IsdnSubaddress value for each B-channel:

Key or Value	Description
B-channel key	A zero-based index that identifies the B-channel. The maximum value for a B-channel key is one less than the IsdnNumBchannels value assigned to the D-channel to which the B-channel belongs.
IsdnSpid	A REG_SZ value that indicates the SPID, if any, specified by the user for the B-channel.
IsdnPhoneNumber	The phone number, if any, specified by the user for the B-channel.
IsdnSubaddress	The subaddress, if any, specified by the user for the B-channel.

The following example is an ISDN adapter's registry section layout . Each registry key is enclosed in square brackets, for example: [ KeyName ]. The ISDN keys and values that were added by the INF file for the ISDN adapter are highlighted in boldface text; the ISDN keys and values that were added by the ISDN Wizard appear in normal (nonboldface) text.

[...Enum\emumeratorID\device-instance-id]  ;ISDN adapter instance key
WanEndpoints=4
IsdnNumDChannels=2
IsdnAutoSwitchDetect=1
IsdnSwitchType=0x4  ;National ISDN 1

[...Enum\emumeratorID\device-instance-id\0]  ;D-channel 0
IsdnNumBChannels=2
IsdnMultiSubscriberNumbers=1234567 2345678 3456789

[...Enum\emumeratorID\device-instance-id\0\0]  ;B-channel 0 for D-channel 0
IsdnSpid=00555121200
IsdnPhoneNumber=5551212
IsdnSubaddress=

[...Enum\emumeratorID\device-instance-id\0\1]  ;B-channel 1 key for D-channel 0
IsdnSpid=00555121300
IsdnPhoneNumber=5551213
IsdnSubaddress=

[...Enum\emumeratorID\device-instance-id\1]  ;D-channel 1 key
IsdnNumBChannels=2
IsdnMultiSubscriberNumbers=8675309 2390125 7658156

[...Enum\emumeratorID\device-instance-id\1\0]  ;B-channel 0 for D-channel 1
IsdnSpid=00555987600
IsdnPhoneNumber=5559876
IsdnSubaddress=

[...Enum\emumeratorID\device-instance-id\1\0]  ;B-channel 1 for D-channel 1
IsdnSpid=00555876500
IsdnPhoneNumber=5558765
IsdnSubaddress=