AT&T MERLIN LEGEND Release 3.1, Руководство по системному программированию

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PRI Facilities
4–152
Programming Procedures
The timers and counters are listed below.
■
T200 Timer. Times the delay in the link layer acknowledgement 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 acknowledgement 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:
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.