Nortel Meridian Meridian 1 Maintenance Manual page 340

328 Chapter 7: CCR log file messages
553-3211-510 Standard 1.0 October 1998
Notes on flow control
Errors related to flow control have the following severity levels:
¥ Level 0 indicates no flow control (the flow control condition has
cleared). Continue or resume normal call processing operation. See
CCR message 6018.
¥ Level 1 is a warning that messages are being sent to Meridian 1 too
quickly. Call execution is slowed down by waiting for a short period of
time before continuing to the next call execution. Therefore the
message traffic generated is much lower than during normal operation.
New calls are handled immediately. See CCR message 5001.
¥ Level 2 is similar to level 1 except that now no call initiation messages
may be sent to Meridian 1. All new calls will be rejected to the
Meridian 1 for default treatment. Existing calls will be suspended (no
further execution of calls will be done until level 0 is restored or the
link fails). See CCR message 2012.
¥ Level 3 indicates that no input can be sent to Meridian 1. New calls
will time-out, or be defaulted by the Meridian 1 before it even sends
the new call indication to CCR. Because CCR can no longer
communicate with the Meridian 1, it will treat a Level 3 Flow Control
event the way it treats a Link Down event. That is, it will clean up its
entire call database and do nothing until the situation clears (Level 0
indication, equivalent to a Link Up event). All existing calls in the
system will be reverted to default by the Meridian 1. See CCR
message 2013.
Flow control parameters are defined in the Meridian 1 configuration for the
AML. The following parameters are defined in LD17 for the ESDI or
MSDL port corresponding to the AML:
¥ SECU=YES
¥ INTL (the interval period for determining flow control)
¥ MCNT (the threshold for the number of messages during the interval
set for INTL)