Configuring PSTN/PRI trunks

This section applies to the following models only:

FVE 300E-T
FVE 500E-T2
FVE 1000E-T
FVE 2000E-T2

PSTN (Public Switched Telephone Network)/PRI (Primary Rate Interface) trunks connect your PBX or VoIP network to your PSTN service providers and through them to the outside world. These trunks can be analog or digital phone lines.

You can modify the default trunks or create new ones.

To view the PSTN trunks

Go to Trunk > PRI > PRI.

GUI field	Description
Enabled	Select to activate the trunk.
Name	The name of the trunk.
Status	The trunk statuses, including: In service: The trunk is currently in use. Not activated: The trunk is not enabled. Idle: The trunk is not in use. Unavailable: The trunk is not reachable. Conflict: The trunk conflicts with another one. Alarm detected: There is a problem with the trunk. Admin down: The trunk is disabled.
Type	The trunk type: digital or analog.

To add a T1/E1 voice circuit trunk

Go to Trunk > PRI > PRI.
Click New.

Configure the following:

GUI field

Description

Trunk Setting

Enabled

Select to activate the trunk.

Name

The name of this trunk. This is view only.

Display name

Enter your caller ID that will appear on the called phone, such as Example Company.

Number

Enter the phone number that will appear on the called phone.

Status

Shows the status of the PRI trunk.

Hardware Property

Use this option to configure the T1/E1 span.

Spans represent trunks (spans) of T1/E1 PSTN lines. The FortiVoice unit supports T1/E1 lines according to the installed voice card. You can add a span name using the CLI.

In Span, click in the field and select the span for the trunk from the popup window.

Edit span

Click Edit ( ) after selecting a span to configure the settings of the T1/E1 span to match the same settings of your PSTN service provider. Click OK after finishing the configuration. For more information, see Configuring the T1/E1 span.

Span

Click in the field and select the span for the trunk from the popup window.

Max channel

Indicates the total number of B channels on all spans.

Max outgoing channel

Enter the number of outgoing channels out of the maximum number of B channels.

Fax

Configure fax and phone signal automatic detection and fax handling.

Automatic fax detection

Selecting this option may cause the following behaviors:

Delay the call response time on this trunk by automatically adding two ring tones to detect incoming fax signals.
Affect toll charges on incoming lines.

Select for the FortiVoice unit to detect incoming fax signal on this trunk automatically.

Forward to DID mapping extension

This option is available when you select Automatic fax detection.

Select this option if a DID number is mapped directly to an extension to receive voice and fax calls (see details in To map a personal fax DID number). Faxes will be sent to the extension’s personal fax account, accessible through the User Portal.

In Forward to eFax account (next field), select an eFax account (as configured in Receiving faxes). Should a fax fail to be received by the DID mapping extension, the FortiVoice will use this eFax account as a fallback.

Forward to eFax account

This option is available when you select Automatic fax detection.

Select an eFax account to receive faxes. To configure an eFax account, see Receiving faxes.

Phone Number

Click New to add the phone number provided by your PSTN service provider. This is your DID number. Your PSTN service provider will direct calls from external callers directly to this number. You can add multiple numbers, including numbers from full or fractional PRI (T1/E1).

Click OK.

Configuring the T1/E1 span

You can configure the Setting of the T1/E1 span, including full or fractional PRI (T1/E1), to match the same Setting of your PSTN service provider.

For 2000E-T2, if a PRI trunk includes two spans, the configuration of the second span is much simpler as the spans share many configurations.

For more information, see Hardware Property.

To configure the T1/E1 span

On the Trunk > PRI > PRI page, select a PRI trunk and click Edit.
In Hardware Property, go to Edit span, select a span, and click Edit .

Configure the following:

GUI field		Description
Standard Options
	Name	The name of this span. This is view-only.
	Type	Select the span type: PRI T1 or PRI E1. A T1 span usually supports 23+1 channels, while an E1 span supports 30 channels in CAS (Channel Associate Signaling) mode and 30 B channels and one D channel in ISDN mode.
	Signaling	Select the signaling type of the ISDN PRI: PRI signalling, CPE (Customer Premises Equipment) side PRI signalling, network side PRI R2 signalling
Advanced Options
	Framing and coding options	Specify the type of framing and coding to provision the PRI with your PSTN service provider.
	Clocking options	Select the FortiVoice unit’s clock synchronization: Clock sourcing from PSTN network Internal clocking source This option does not need to match that of your PSTN service provider.
	Receive sensitivity	Select the level of receiver sensitivity which is the ability of the phone receiver to pick up the required level of phone signals to make it operate more effectively within its application. This option does not need to match that of your PSTN service provider.
	D-channel signalling format	Select a signalling method for the D channel which is a signalling channel and carries the information needed to connect or disconnect calls and to negotiate special calling parameters (for example, automatic number ID, call waiting, data protocol). The D channel can also carry packet-switched data using the X.25 protocol. If you choose Lucent 5ESS, the facility service for sending the display name is enabled automatically.
	Line build out	Select the line build out (LBO). LBO Setting are an inherent part of T1 and T3 network element transmission circuitry. Since cable lengths between network elements and digital signal cross-connect (DSX) vary in the central office, LBO Setting are used to adjust the output power of the transmission signal to achieve equal level point (ELP) at the DSX.
	D-channel	By default, depending on your selection of Type, the typical channel numbers are: Full T1: 24 Full E1: 16 You can also set the channel numbers to others such as 1. The Setting you configure must match the same Setting of your PSTN service provider.
	B-channel	By default, depending on your selection of Type, the typical channel Setting are: Full T1: 1-23 Full E1: 1-15, 17-31 You can also configure the fractional channel numbers. For example, for T1/E1, the channels can be: 1-12 2, 3, 4, 9-15 2-4, 9-15 The Setting you configure must match the same Setting of your PSTN service provider.
	PRI dialplan type	This option is active only if you select PRI signalling, CPE side or PRI signalling, network side for Signaling. Select a diaplan type.
	PRI local dialplan type	This option is active only if you select PRI signalling, CPE side or PRI signalling, network side for Signaling. Select a local dialplan type.
	PRI connected party notification diaplan type	This option is active only if you select PRI signalling, CPE side or PRI signalling, network side for Signaling. Select a dialplan type for the connected party notification.
	PRI indication type	This option is active only if you select PRI signalling, CPE side or PRI signalling, network side for Signaling. Select an indication type.
PRI R2 Setting		This option is active only if you select PRI R2 signalling for Signaling. Since there is no single signaling standard for R2, the FortiVoice unit addresses this challenge by supporting many localized implementations of R2 signaling.
	Country	Select the country for PRI R2 Setting.
	Max ANI digits	ANI (automatic number identification) is a system used by telephone companies to identify the DN (directory number) of a calling subscriber. It allows subscribers to capture or display caller’s telephone number. Enter the number of digits of a caller‘s phone number to be captured. The default is 20.
	Max DNIS digits	A dialed number identification service (DNIS) is a service provided by telephone companies that lets the subscribers determine which telephone number was dialed by a caller. Enter the number of digits of a dialed call to be sent by the telephone company. The default is 20.
	Caller category	Select the caller type.
	Incoming digits mode	Select the incoming digits mode by consulting your telephone company.
	DTMF option	DTMF dialing: Select to enable dual-tone multi-frequency signaling (DTMF) dialing. DTMF answering: Select to enable dual-tone multi-frequency signaling (DTMF) answering.
	Allow collect calls	Select to allow collect calls.
	MF timeout	To enable the multi-frequency (MF) timeout, enter a value in milliseconds. The default is -1, which disables the setting.
	Metering pulse timeout	To enable the metering pulse timeout, enter a value in milliseconds. The default is -1, which disables the setting.

Click OK.

Configuring the analog voice trunk

You can configure the Setting of the analog CO trunk to match the same Setting of your PSTN service provider except the TX/RX gain Setting.

For more information, see Hardware Property.

To configure the analog CO trunk

On the Analog page, click Edit under Hardware Property.

Configure the following:

GUI field		Description
PSTN Analog Setting
	Name	The name of this configuration. This is view-only.
	Codec	Select the Codec for the trunk.
	Caller ID signalling	Select the caller ID signalling standard per your phone company’s request.

Click OK.