2.2.4.1.3.44 MonitorDigits

The MonitorDigits packet is transmitted from a TAPI client to a TAPI server in a remote procedure call. Sending this packet enables or disables the unbuffered detection of digits that are received on the call. Each time a digit of the specified digit modes is detected, a LINE_MONITORDIGITS packet is sent to the application by TAPI, indicating which digit is detected.

0	1	2	3	4	5	6	7	8	9	1 0	1	2	3	4	5	6	7	8	9	2 0	1	2	3	4	5	6	7	8	9	3 0	1
Req_Func
Reserved1
hCall
dwDigitModes
Reserved2
Reserved3
Reserved4
Reserved5
Reserved6
Reserved7
Reserved8
Reserved9
Reserved10
Reserved11
Reserved12

Req_Func (4 bytes): An unsigned 32-bit integer. The identifier of the function that will be invoked on the remote server. This value MUST be set to 49.

Return Values

On completion of ClientRequest, this field contains the result of the encapsulated telephony request. A value of 0 indicates success, and a LINEERR_Constants value indicates failure. The remote server MUST complete this call synchronously.

MUST return zero if the function succeeds or an error number if an error occurs. Common return values are as follows:

Name	Value
LINEERR_INVALCALLHANDLE	0x80000018
LINEERR_OPERATIONUNAVAIL	0x80000049
LINEERR_INVALCALLSTATE	0x8000001C
LINEERR_OPERATIONFAILED	0x80000048
LINEERR_INVALDIGITMODE	0x80000027
LINEERR_RESOURCEUNAVAIL	0x8000004B
LINEERR_NOMEM	0x80000044

Reserved1 (4 bytes): An unsigned 32-bit integer. MUST be set to zero when sent and MUST be ignored on receipt.

hCall (4 bytes): An HCALL. The handle to the call on which digits are to be detected. The call state of hCall can be any state except idle or disconnected. One way of obtaining a valid hCall is by sending the MakeCall packet. Also a valid hCall can be obtained from LINE_CALLSTATE packet sent by the remote server.

dwDigitModes (4 bytes): An unsigned 32-bit integer. The digit modes that are to be monitored. A dwDigitModes parameter with a value of 0 cancels digit monitoring. The dwDigitModes parameter MUST have one of the LINEDIGITMODE_Constants.

Reserved2 (4 bytes): An unsigned 32-bit integer. This field is used for padding and MUST be ignored on receipt. It can be any value.

Reserved3 (4 bytes): An unsigned 32-bit integer. This field is used for padding and MUST be ignored on receipt. It can be any value.

Reserved4 (4 bytes): An unsigned 32-bit integer. This field is used for padding and MUST be ignored on receipt. It can be any value.

Reserved5 (4 bytes): An unsigned 32-bit integer. This field is used for padding and MUST be ignored on receipt. It can be any value.

Reserved6 (4 bytes): An unsigned 32-bit integer. This field is used for padding and MUST be ignored on receipt. It can be any value.

Reserved7 (4 bytes): An unsigned 32-bit integer. This field is used for padding and MUST be ignored on receipt. It can be any value.

Reserved8 (4 bytes): An unsigned 32-bit integer. This field is used for padding and MUST be ignored on receipt. It can be any value.

Reserved9 (4 bytes): An unsigned 32-bit integer. This field is used for padding and MUST be ignored on receipt. It can be any value.

Reserved10 (4 bytes): An unsigned 32-bit integer. This field is used for padding and MUST be ignored on receipt. It can be any value.

Reserved11 (4 bytes): An unsigned 32-bit integer. This field is used for padding and MUST be ignored on receipt. It can be any value.

Reserved12 (4 bytes): An unsigned 32-bit integer. This field is used for padding and MUST be ignored on receipt. It can be any value.