2.34. gc_SndFrame( )

The gc_SndFrame( ) function sends a Layer 2 frame to the ISDN data link layer. The following ISDN L2 block structure can be passed to the function via the GC_L2_BLK structure:

     l2_blk_ptr[0] = 0x08;     /* Protocol discriminator */
     l2_blk_ptr[1] = 0x02;     /* CRN length - 2 bytes */
     l2_blk_ptr[2] = 0x03;     /* CRN = 8003 */
     l2_blk_ptr[3] = 0x80;
     l2_blk_ptr[4] = 0x6e;     /* msg type = NOTIFY */ 
     /* The first IE */
     l2_blk_ptr[5] = 0x27;     /* IE type = 27 (NOTIFY) */
     l2_blk_ptr[6] = 0x01;     /* The length of NOTIFY */
     l2_blk_ptr[7] = 0xF1;     /* Notify indication */ 
     /* The second IE */
     l2_blk_ptr[8] = 0x76;     /* IE type = 76 (REDIRECTION) */
     l2_blk_ptr[9] = 0x03;     /* length of redirection */
     l2_blk_ptr[10] = 0x01;    /* unknown type and E164 plan */
     l2_blk_ptr[11] = 0x03;    /* network provides presentation */
     l2_blk_ptr[12] = 0x8D;    /* reason = transfer */ 

Note: When using DM3 boards, the gc_SndFrame( ) function returns an error if the number of bytes in the transmit frame exceeds the limit of 260 bytes.

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