6.7. L2_BLK

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;

Table 36. L2_BLK Field Descriptions

Field	Description
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.

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