6.2. channel_id

The channel_id structure is used within the MAKECALL_BLK structure to specify the channel indicator and the channel indicator mode for the call waiting feature. The channel indicator specifies the Channel resource preference (NO_BCHAN, ANY_BCHAN, DCHAN_IND, or a specific B-Channel number). To initiate a waiting call, the channel indicator must be set to NO_BCHAN. The channel indicator mode (PREFERRED or EXCLUSIVE) should be selected if a B channel is specified.

NOTE:

The channel indicator and the channel indicator mode are only used if a board device handle is specified in the function call. If a line device handle is specified, these indicators will be ignored.

The structure is defined as follows:

struct {  
    byte channel;        
    byte channel_mode;   
    short rfu;    
} channel_id;

Table 31. channel_id Descriptions and Values

Field	Description	Values
channel	Specifies the channel to be used.	NO_BCHAN -- No B channel ANY_BCHAN -- Any B channel DCHAN_IND -- Non circuit switched
channel mode	Specifies the channel mode to be used for the B channel, if a B channel is specified in the channel field.	PREFERRED -- B channel preferred EXCLUSIVE -- B channel exclusive
rfu	Reserved for future use	Not used

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