Ni-1 Bri Timers - Lucent Technologies MERLIN LEGEND Release 7.0 System Planning Manual

MERLIN LEGEND Communications System Release 7.0
System Planning 555-670-112
3 Lines/Trunks
Selecting Line/Trunk Options
!
CAUTION:
Since incorrect settings can hinder the operation of BRI facilities, consult
with a Lucent Technologies representative or authorized dealer before
making changes. The factory-set thresholds are standard settings and
should rarely be changed.
The timers, descriptions, factory settings, and allowable thresholds are shown in
Table 3-5.
Planning Form Instructions
On Form 3i, Incoming Trunks: BRI Options (800 NI-BRI Module), under the
"Timers and Counters" heading on page 2. For each timer:
Table 3-5.

NI-1 BRI Timers

Name Description
T200 The minimum time which Layer 2 must wait
for an acknowledgment of a link
establishment frame, an information frame,
or a polling supervisory frame, before
initiating retransmission procedures.
T203 The maximum time for which the Layer 2
link can remain inactive.
T303 The delay in central office response after
the system has sent a SETUP message to
initiate an outgoing call.
T305 The delay in response from the central
office after the system has initiated a
DISConnect message for call clearing.
T308 The delay in response from the central
office after the system has sent a RELease
message for call clearing.
To keep the factory setting, check the first box under the timer name.
To change the factory setting, check the second box under the timer
name and write the new threshold in the space provided.
Factory Allowable
Setting Threshold
1,000 500 5,000 ms, in
ms increments of 500 ms
33 10–255 seconds, in
seconds increments of 1 second
4 2–10 seconds, in
seconds increments of 1 second
30 2 60 seconds, in
seconds increments of 1 second
4 2 10 seconds, in
seconds increments of 1 second
Issue 1
April 1999
3-51
3