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MERLIN LEGEND Communications System Release 6.0
System Programming
555-660-111
Issue 1
February 1998
Programming Procedures
Page 4-198PRI Facilities
4
If the network does not respond before the programmed time or count, the system
takes the appropriate corrective action.
The timers and counters are listed below.
■ T200 Timer. Times the delay in the link layer acknowledgment of a
message sent from the system to the network over a D-channel.
■ T203 Timer. Times the interval between each exchange of messages
between the system and the network on the D-channel.
■ N200 Counter. Counts the number of times the system has transmitted a
message on a D-channel because no link layer acknowledgment is
received from the network.
■ N201 Counter. Counts the maximum number of layer three octets the
system can send or receive in a single D-channel message.
■ K Counter. Counts the number of layer three unacknowledged messages
sent from the system to the network on a D-channel.
■ T303 Timer. Times the delay in network response when the system sends
a setup message to initiate an outgoing call.
■ T305 Timer. Times the delay in network response when the system sends
a disconnect message to clear a call.
■ T308 Timer. Times the delay in network response when the system sends
a release message to clear a call.
■ T309 Timer. Times the duration of a D-channel data link failure (a loss of
signaling for the entire PRI connection).
■ T310 Timer. Times the network delay following the receipt of a call
preceding message on an outgoing call.
■ T313 Timer. Times the delay in network response when the system sends
a connect message that indicates the completion of an incoming call.
■ T316 Timer. Times the delay in network response when the system sends
a restart message to clear a B-channel.
NOTE:NOTE:NOTE:
If you enter an invalid timer value, the number you enter is truncated to the
closest valid value. For example, if you enter 45 for a counter that ranges
from 0 to 30, 4 is recorded as the counter value.
Table 4–2
shows the factory setting for each timer and counter and the valid range
for each threshold.