BRI Trunk Settings

This topic describes all the settings on a BRI trunk for reference.

Basic settings

The following settings are required for a BRI trunk, which affect the connection status of the trunk.
Setting Description
Name Give this trunk a name to help you identify it.
Signaling Specify the signaling type according to the direction provided by your service provider.
  • Peer to Peer
  • Peer to Multiple Peers
Signaling Role
Specify whether this interface will act as the user or the network.
  • User
  • Network
Note:
  • If the service provider acts as the network, the PBX needs to be set as the user.
  • If the service provider acts as the user, the PBX needs to be set as the network.
Switch Type

Configure the switch type according to the direction provided by your service provider.

  • EuroISDN
  • National 2
  • National 1
  • DMS100
  • AT&T 4ess
  • Lucent 5ess
  • Q.SIG

Advanced settings

Advanced settings affect inbound calls and outbound calls through the BRI trunk. Incorrect configuration may cause call failure.

The following settings are included on the Advanced page.

Advanced
Setting Description
Echo Cancellation

Enable or disable echo cancellation.
Facility-based ISDN Supplementary Services

Decide whether to enable transmission of facility-based ISDN supplementary services (such as caller name from CPE over facility) or not.

Codec Select the codec for this trunk.
Overlap Dial

Define whether the system can dial this switch using overlap digits or not. If you need Direct Dial-in, then enable this option.

Reset Interval

This sets the time in seconds between restart of unused B channels. Set the internal to Never if you don't like the channel to restart.

PRI Indication

Select the PRI Indication.

  • Out-of-Band: Use RELEASE, DISCONNECT or other messages with CAUSE to indicate call progress (e.g. cause: unassigned number or user busy).
  • Inband: Use in-band tones to play busy or congestion signal to the other side.
    Note: Inband notification is not available on all PRI/BRI subscription lines.
Carrier Hangup Tone Detection
  • Check this option: You will hear the hangup tone played by your carrier when the other party hangs up.
    Note: First check with your carrier whether they will send the prompt or not.
  • Uncheck this option: You will hear the hangup tone played by the system when the other party hangs up.
Hide Outbound Caller ID

Whether to hide caller ID or not when calling out through this trunk.
Ignore Remote Hold Indications If you wish to ignore remote hold indications and use PBX's Music on Hold, enable this option.
Dialplan
Setting Description
Calling Party Numbering Plan

Select the Calling Party Numbering Plan.
Calling Party Numbering Type

Select the Calling Party Numbering Type.
Called Party Numbering Plan

Select the Called Party Numbering Plan.
Called Party Numbering Type

Select the Called Party Numbering Type.
Presentation Indicator

The PI provides instructions on whether the provided calling line identity is allowed to be presented, or indicates that the number is not available.
Screen Indicator

The SI provides information on the source and the quality of the provided information.
ISDN Dialplan

ISDN/telephony numbering plan (Recommendation E.164)
International Prefix

Dialplan: '(Calling Party Numbering Plan:ISDN +)Calling Party Numbering Type:International'.
National Prefix Dialplan: '(Calling Party Numbering Plan:ISDN +)Calling Party Numbering Type:National'.
Local Prefix

Dialplan: '(Calling Party Numbering Plan:ISDN +)Calling Party Numbering Type:Subscriber'.
Private Prefix

Dialplan: 'Calling Party Numbering Plan:private + Calling Party Numbering Type:Subscriber'.
Unknown Prefix

Dialplan: '(Calling Party Numbering Plan:ISDN +)Calling Party Numbering Type:Unknown'.

DIDs/DDIs

Direct Inward Dialling (DID), also called Direct Dial-in (DDI), is a service offered by telephone companies. For more information of DID concepts, see DID Number Overview.

Inbound Caller ID Reformatting

When a user calls in the PBX, the trunk provider may send a caller ID that is inconvenient for you to redial directly.

In this case, you can reformat inbound caller ID based on a trunk. The caller ID will be reformatted before it is sent to the called party.

For more information, see Reformat Inbound Caller ID based on a Trunk.

Outbound Caller ID

Outbound caller ID is the phone number or name that is displayed on the called party's device.

You can set up a global outbound caller ID for a trunk or assign caller IDs for extension users.

Note: By default, each trunk has a default phone number that will be displayed on the called party's device. Outbound Caller ID configuration requires support from the trunk provider. Contact your trunk provider first before you configure Outbound Caller ID, or the settings won't take effect and outbound calls may fail.

If you set the caller ID number, when users make outbound calls through this trunk, the called party will see this caller ID number instead of the calling party's number.

For more information of outbound caller ID configurations, see Customize Outbound Caller IDs for Outbound Calls