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The L2_BLK structure is used to send and receive layer 2 information to an ISDN
interface using the cc_GetFrame( ) and cc_SndFrame( ) functions.

The structure is defined as follows:

#define MAXLEN_IEDATA

254

typedef struct

{

char

sapi;

char

ces;

short

length;

char

data[MAXLEN_DATA];

}

L2_BLK, *L2_BLK_PTR;

sapi

The Service Access Point Identifier (applies to BRI only, set to 0
for PRI).

ces

The Connection Endpoint Suffix (applies to BRI only, set to 0 for
PRI).

length

The total bytes of the following data field.

data

This field contains the received frame.

The MAKECALL_BLK structure contains the parameters used to specify an
outgoing call. Outgoing calls are made using the cc_MakeCall( ) function. The
parameters for outgoing calls are set when the MAKECALL Block function is
initialized. For information on initializing the MAKECALL Block, see Section
6.8.1.  MAKECALL_BLK Initialization.

The structure is defined as follows:

struct is {

unsigned char BC_xfer_cap;
unsigned char BC_xfer_mode;