Modifying PSTN/PRI trunks

This section applies to the following models only: FVE 200D-T 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

1. Go to Trunks > PRI > PRI.
2. Click New.
3. Configure the following:

   GUI field		Description
   Trunk Setting
   	Name	The name of this trunk. This is view only.
   	Enable	Select to activate the trunk.
   	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. If you entered the external caller ID in External caller ID, this trunk phone number will be overridden by the external caller ID.
   	Relay fax	Select to allow T.38 fax relay on the trunk. Enter the fax number.
   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 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. In 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	Select for the FortiVoice unit to detect incoming fax signal on this trunk automatically.
   	Forward tax to eFax account	Select the fax receiving account for the detected 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).

4. Click OK.

To add an analog CO trunk for 200D-T

1. Go to Trunks > Analog > Analog.
2. Click New.
3. Configure the following:

   GUI field		Description
   Analog Setting
   	Name	Enter a name for this trunk.
   	Enabled	Select to activate the trunk.
   	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. If you entered the external caller ID in External caller ID, this trunk phone number will be overridden by the external caller ID.
   Hardware Property
   	analog1	Use this option to configure the analog trunk. Click Edit to configure the PSTN analog Setting to match the same Setting of your PSTN service provider. Click OK after finishing the configuration. For more information, see Configuring the analog voice trunk.
   	Port	Select the FXO ports you want for this trunk and click -> to move them into the Selected ports field. Each FXO port provides an analog phone line for a FXO device, such as a phone or fax.
   	Max channel	Indicates the total number of channels on the trunk.
   	Max outgoing channel	Enter the number of outgoing channels out of the maximum number of channels on the trunk.
   Fax		Configure fax and phone signal automatic detection and fax handling.
   	Automatic fax detection	Select for the FortiVoice unit to detect incoming fax signal on this trunk automatically.
   	eFax account	Select the fax receiving account for the detected faxes.
   Phone Number		Click New to add the phone number provided by your PSTN service provider. Your PSTN service provider will direct calls from external callers directly to this number. You can add multiple numbers.

4. Click Create.

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

1. On the PRI page, click Edit after selecting a span name under Hardware Property.
2. 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.
   	Signalling	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 option	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 R2 Setting		Since there is no single signaling standard for R2, the FortiVoice unit addresses this challenge by supporting many localized implementations of R2 signaling. This option is active only if you select PRI R2 signalling for Signalling.
   	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.
   	Max DNIS digits	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.
   	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.

3. 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

1. On the Analog page, click Edit under Hardware Property.
2. 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.

3. Click OK.