Avaya Configuring Dial Services Manual do Utilizador descarregar pdf (Página 221)

100

101

Customizing ISDN Lines

308621-14.00 Rev 00

11-17

Modifying the BRI T4 Timer

The BRI T4 timer indicates the amount of time that 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 whether the line recovers within the T4 timer period. This enables the

router to suppress minor line problems from the upper-layer protocols.

To modify the T4 timer, enter:

t4-timer

integer

is a value from

500 to 1000 milliseconds.

For example:

bri/1/1#

t4-timer 600

If your line is noisy, enter the maximum amount of time that the router should

wait for the line to reactivate.

Customizing Conformance Testing

The

bchannel-loopback

parameter is for layer 1 ISDN BRI conformance testing.

It allows the external equipment to send data to the router over the B channels and

loop it back out the S/T or U interface (ARN only). The external equipment can

verify its physical connection to the router.

To enable a test, enter:

bchannel-loopback

enabled

The default is disabled.

For example:

bri/1/12#

bchannel-loopback enabled

Do not enable this parameter when the router is in normal operational mode.

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