Справочник Пользователя для Lucent Technologies 6.1
MERLIN LEGENDCommunications System Release 6.1
System Planning
System Planning
555-661-112
Issue 1
August 1998
Lines/Trunks
Page 3-48
Selecting Line/Trunk Options
3
Timers
3
Timers ensure that the system takes the appropriate corrective action when the
expected response is not received from the network during normal operation.
expected response is not received from the network during normal operation.
!
CAUTION:
!
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.
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
3
On Form 3i, Incoming Trunks: BRI Options (800 NI-BRI Module), under the
“Timers and Counters” heading on page 2:
“Timers and Counters” heading on page 2:
1.
For each timer:
■
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.
name and write the new threshold in the space provided.
Table 3–5.
NI-1 BRI Timers
If this system is installed outside of the U.S., continue to the next section.
Otherwise, skip to the following section, “Assigning Lines/Trunks.”
Otherwise, skip to the following section, “Assigning Lines/Trunks.”
Name Description
Factory
Setting
Setting
Allowable
Threshold
Threshold
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.
for an acknowledgment of a link establishment
frame, an information frame, or a polling
supervisory frame, before initiating
retransmission procedures.
1,000 ms
500
−
5,000 ms, in
increments of 500 ms
T203
The maximum time for which the Layer 2
link can remain inactive.
link can remain inactive.
33 seconds 10–255 seconds, in
increments of 1 second
T303
The delay in CO response after the system
has sent a SETUP message to initiate an
outgoing call.
has sent a SETUP message to initiate an
outgoing call.
4 seconds
2–10 seconds, in
increments of 1 second
increments of 1 second
T305
The delay in response from the CO after the
system has initiated a DISConnect message
for call clearing.
system has initiated a DISConnect message
for call clearing.
30 seconds 2
−
60 seconds, in
increments of 1 second
T308
The delay in response from the CO after the
system has sent a RELease message for call
clearing.
system has sent a RELease message for call
clearing.
4 seconds
2
−
10 seconds, in
increments of 1 second