Avaya Configuring Dial Services Manual de usuario descargar pdf (Pagina 221)

100

101

Customizing Line Pools

117353-B Rev. 00

9-49

Activating ISDN S/T and U Interfaces

You can set the BRI T3 timer which 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.

To modify the T3 timer enter:

t3-timer

integer

can be a value from 1 to 30.

For example:

bri/1/1# t3-timer 10

The value you set 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.

Modifying the BRI T4 Timer

The BRI T4 timer 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.

To modify this timer enter:

t4-timer

integer

can be from

500 to 1000 milliseconds.

For example:

bri/1/1# t4-timer 600

If your line is noisy, enter the maximum time for the router to wait for the line to

reactivate.

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