4000 Router Series Layer 2 - WAN Command Reference

Default

When the device is communicating with a PBX:

• ISDN must wait for a CONNECT ACK message in response to a CONNECT message before it can

switch to the ACTIVE state to start data and voice service communications.

• ISDN needs to reply to the peer with a CONNECT ACK message after receiving a CONNECT

message.

Views

ISDN interface view

Predefined user roles

network-admin

Parameters

incoming: Switches the ISDN protocol state to ACTIVE after sending a CONNECT message without

having to wait for a CONNECT ACK message from the PBX.

outgoing: Switches the ISDN protocol state to ACTIVE after receiving a CONNECT message without

sending a CONNECT ACK message.

Usage guidelines

When the device is communicating with a PBX, its settings must be the same as those on the PBX.

You can execute this command only if no call exists on the ISDN interface.

Examples

# Set the call process on BRI 2/0 to proceed to the ACTIVE state without waiting for a CONNECT ACK

message.

<Sysname> system-view

[Sysname] interface bri 2/0

[Sysname-Bri2/0] isdn ignore connect-ack incoming

# Set the call process on BRI 2/1 to proceed to the ACTIVE state without sending a CONNECT ACK

message.

<Sysname> system-view

[Sysname] interface bri 2/1

[Sysname-Bri2/1] isdn ignore connect-ack outgoing

isdn ignore hlc

Use isdn ignore hlc to disable ISDN from carrying the HLC information element in setup messages sent

when placing voice calls.

Use undo isdn ignore hlc to restore the default.

Syntax

isdn ignore hlc

undo isdn ignore hlc

Default

When the ISDN protocol is 5ESS or QSIG, setup messages do not include the HLC information element.

For other ISDN protocols, setup messages include the HLC information element.