6.2.4. Messages When Transmitting Individual Call Data 
The following describes the different messages for the transmission
of individual call data:
- Send CDR information,
- CDR information block on demand or with immediate output,
- Bad or good CDR information end,
- CDR information processed,
- CDR data retrieval request
- Repeat the same call data record (immediate output),
- Verification of connection ("heartbeat").
The record identifier unambiguously identifies each message.
The message contents are represented in EBCDIC. Numerical message
elements are to be interpreted as decimals in EBCDIC strings.
The setup of the messages is defined. However, you can use AMO FTBL
(format table administration) to configure and change the format and
the content of the actual connection and call detail data within the
data blocks (data records with record identifiers "AA", "AB",
"AH" and "AI") so that it is customer-specific.
The separate data elements of the messages are summarized and explained
in Section 59.5,
"Types of Elements When Transmitting Call Detail Data".