AT&T MERLIN LEGEND Key System Planning page 78

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Table 3-5 Timers and Counters
Description
Name
T200 Timer Times the delay in link-layer acknowledgement of a
message sent over a D channel from the system to
the network.
T203 Timer Times the interval of each exchange of messages on
the D channel between the system and the network.
N200 Counter Counts the times the system has transmitted a
message on a D channel when no link-layer
acknowledgement is received from the network.
N201 Counter Counts the maximum number of layer-3 octets the
system can send or receive in a single D-channel
message.
K Counter Counts the layer-3 unacknowledged messages sent
on a D channel from the system to the network.
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,
which consists of a loss of signaling for the entire PRI
connection.
T310 Timer Times the network delay following the receipt of a
call-proceeding 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.
3-24
Line options
Allowable
Threshold
Factory Setting
100-3000 ms
1 second
1-60 seconds
30 seconds
1–5 transmissions
3 transmissions
260 octets 16-260 octets
7 frames 1-15 frames
4 seconds 4-12 seconds
4 seconds 4-30 seconds
4 seconds 4-12 seconds
90 seconds 30-120 seconds
10 seconds 2–10 seconds
4-12 seconds
4 seconds
120 seconds 3-120 seconds