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11.6.6. CCM with Block Separators and End-of-Block Characters Previous topic Parent topic Child topic Next topic

The length of the calling line information element varies according to where a caller is calling from (e.g. 12 digits for calls from digital ISDN exchanges, 0 digits for calls from analog exchanges, or 5 digits for internal calls). To compensate for this, some multiple code-calling systems can interpret block separator characters (*) and an end-of-block character (#). These special characters allow you to set a variable A-block length The block separator characters separate the A-block, the B-block, and the C-block of a code-calling block. If an answering code is defined, the end-of-block character follows the C-block. If no answering code is defined, the end-of-block character follows the B-block.
  • Configure the circuit with the TSCSU AMO as for CCM in DISPLAY operation or CCM in Meet-Me operation with display;
    DIFFERENCE:
    OPTYPE=DIS&BLKSEP&BLKEND,
    or
    OPTYPE=MEETME&BLKTSEP&BLKEND,
    and
    MABLK=16 (maximum length);
    In this case, for incoming calls from analog exchanges (calling line identification information element is 0), a single zero is transmitted in the A-block.
    If the code-calling system requires fixed lengths for the A block and the B-block, you should specify a fixed length for the A-block, and omit the block separators. In this case, if the answering number differs from the number of the calling party, the left or right side of the answering number display block (B-block) will either be filled in with zeroes (if the number is shorter) or the number will run off the left or right side of the block (if longer).
  • Configure the circuit with the TSCSU AMO as for CCM in DISPLAY operation or CCM in Meet-Me operation with display;
    DIFFERENCE:
    OPTYPE=DIS&NOBSEP&NOBEND,
    or
    OPTYPE=MEETME&NOBSEP&NOBEND,
    and
    MABLK= betewen 1 and 16;