3Com 3031 Command Reference Manual page 274

3com 3031: reference guide

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Using the isdn ignore connect-ack command, you can configure the router to

switch the ISDN protocol state to ACTIVE to start the data and voice service

communications after sending a CONNECT message without having to wait for a

CONNECT ACK message. Using the undo isdn ignore connect-ack command, you

can restore the default setting.

By default, in the event that the router is communicating with an exchange, the

ISDN protocol must wait for the CONNECT ACK message in response to the

CONNECT message before it can switch to the ACTIVE state to start data and

voice service communications.

In the event that the router is communicating with an ISDN exchange, its settings

must be the same as those on the exchange.

You are not allowed to configure this command on an ISDN interface if there is still

a call on it. This command can take effect only if it is configured when there is no

call on the interface. Alternatively, you can manually disable the interface by

executing the shutdown command, configure the command, and then enable the

interface by executing the undo shutdown command. The operations, however,

will lead to the disconnection of the call existing on the interface.

Set the call process on the BRI interface 0/0/0 to proceed to the ACTIVE state

without waiting for CONNECT ACK messages.

[3Com-Bri0/0/0] isdn ignore connect-ack

isdn ignore hlc

isdn ignore hlc

undo isdn ignore hlc

ISDN interface view

Using the isdn ignore hlc command, you can disable ISDN to carry the higher layer

compatibility (HLC) information element in the SETUP messages sent when placing

voice calls. Using the undo isdn ignore hlc command, you can configure ISDN to

carry the HLC information element in SETUP messages.

By default, HLC information element is carried in SETUP messages when placing

voice calls.