Timers And Counters - AT&T MERLIN LEGEND Release 2.0 Programming Summary Manual

PRI Facilities

Timers and Counters

Use this procedure to set timer and counter thresholds.
CAUTION:
The factory settings for these thresholds are standard and rarely
need to be changed.
If you are not sure of the correct timer and threshold settings for your
PRI lines and trunks, check with your authorized support
representative before you make a change.
Incorrect settings can cause your PRI lines and trunks to malfunction.
When no response is received from the network before the programmed
setting, the system takes the appropriate corrective action.
The timers and counters are the following:
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 3 octets the
system can send or receive in a single D-channel message
K Counter – counts the number of layer 3 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
Timers and Counters 8-11