
Configuring Dial Services
A-28
117353-B Rev. 00
Parameter: BRI T3 Timer
Path: ISDN Connector > ISDN Dialup > Edit D Chan >
BRI Interface Configuration
Default: 10 seconds
Options: 1 to 30 seconds
Function: Indicates the amount of time that the router has to try and activate the ISDN S/T
or U interface (ARN only). The router starts this timer while the ISDN interface
is deactivated and the router tries to activate it, for example, when the router
wants to send data. During this period, the router sends INFO 1 frames across
the ISDN interface until the network responds with a signal or the timer expires.
This timer prevents the router from attempting to activate the ISDN interface
interminably.
Instructions: Enter a time limit that is sufficient for the router to activate the ISDN S/T or U
interface. This value should be greater than the time it would take to activate the
ISDN interface under normal conditions. You may want to ask your ISDN
provider for guidelines regarding the subscriber loop transmission, which might
affect the value you enter.
MIB Object ID: 1.3.6.1.4.1.18.3.5.9.8.9.1.14
Parameter: BRI T4 Timer
Path: ISDN Connector > ISDN Dialup > Edit D Chan >
BRI Interface Configuration
Default: 750 milliseconds
Options: 500 to 1000 milliseconds
Function: Indicates the amount of time the router waits for the line to recover from a
deactivated state. This timer prevents brief, minor disturbances on a noisy line
from forcing the router to deactivate the circuit. Instead, the router waits to see
if the line recovers within the T4 timer period. This enables the router to
suppress minor line problems from the upper-layer protocols.
Instructions: Enter a time limit that the router waits for the line to recover before it
deactivates the circuit. If your line is noisy, enter the maximum time for the
router to wait for the line to reactivate.
MIB Object ID: 1.3.6.1.4.1.18.3.5.9.8.9.1.15
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