3Com 3031 Command Reference Manual page 363

Example
[3Com-Serial0/0/0] lapb retry 20
lapb timer
Syntax
lapb timer { t1 t1-value | t2 t1-value | t3 t3-value }
undo lapb timer { t1 | t2 | t3 }
View
Interface view
Parameter
Description
Using the lapb timer command, you can configure the LAPB timers T1, T2 and
T3..Using the undo lapb timer command, you can restore their default values.
T1 is a transmission timer. When T1 expires, DTE (DCE) will start retransmission.
The value of T1 shall be greater than the maximum time between the sending of a
frame and the receiving of its response frame.
T2 is a reception timer. When it expires, the DTE/DCE must send an
acknowledgement frame so that this frame can be received before the peer
DTE/DCE T1 timer expires (T2<T1).
T3 is an idle channel timer, when it expires, the DCE reports to the packet layer
that the channel stays idle for a long time. T3 should be greater than the timer T1
(T3>T1) on a DCE. When T3 is 0, it indicates that it does not function yet.
Example
[3Com-Serial0/0/0] lapb timer t1 3000
lapb window-size Syntax
lapb window-size k-value
undo lapb window-size
Set the LAPB parameter N2 on Serial0/0/0 to 20.
t1-value: The value of timer T1 in ms, its value ranges from 1 to 64000ms.The
default value of T1 is 2000ms.
t2-value: Value of the timer T2 in ms, ranging 1 to 32000.The default value of
T2 is 1000ms.
t3-value: Value of the timer T3 in ms, its value ranges from 0 to 255. The
default value of T3 is 0ms.
Set the LAPB timer T1 on Serial0/0/0 to 3000ms.
LAPB and X.25 Configuration Commands 363