Considerations for Call Detail Recording

Last Updated : Oct 30, 2012 |

This section provides information about how the Call Detail Recording (CDR) feature behaves in certain circumstances. Use this information to ensure that you receive the maximum benefits of Call Detail Recording under all conditions. The following considerations apply to Call Detail Recording:

  • Date and Time

    If you do not administer the time of day in your system, the software does not generate CDR records.

    If a call is in progress while you change the time of day information, the system does not record the duration of the call in the CDR record. Instead, the system records the numeric sequence 9999 in the CDR record. This sequence indicates that the call was in progress when you changed the time of day information.

  • Dial plan

    If the dial plan in your system supports 6-digit or 7-digit extensions, only the formats that already support calling numbers that are longer than 7 digits support 6-digit or 7-digit extensions. Such numbers include expanded, unformatted, customized, and international ISDN calling numbers.

    All other calling number formats send only 5 digits. If the calling number is a 6-digit or a 7-digit extension, the system sends only the last 5 digits.

The following information applies to the port that the secondary CDR output device uses:

  • You can use the following record types for the secondary output:

    • LSU

    • Int-Direct

    • Int-Process

    • Unformatted

  • If the system cannot send records to the primary CDR output device, the system discontinues sending records to the secondary port for 2 minutes. The secondary port must operate at the highest possible speed to prevent the loss of information.

  • If the output buffer is full, the system busies out the secondary port for 2 minutes. This action makes system resources available to send data to the primary CDR port before the data is lost. The system continues to busy out the secondary port for 2-minute intervals until fewer than 400 records, or 1800 records for Release 5r and later, remain in the buffer.

  • When QSIG Advice of Charge is set to receive charging information during a call, message activity is increased on the signaling channel, which has an impact on maximum call capacity.