E1/T1/J1 Trunk Settings

This topic describes all the settings on an E1/T1/J1 trunk for reference.

E1/T1/J1 signaling type

Yeastar P560 and P570 support the following ISDN signaling type, you can configure the trunk according to the information provided by the ISDN carrier.

PRI settings

The table below shows the Basic settings and Advanced settings for the E1/T1/J1 trunk (PRI signaling type).

Setting Description
Basic Settings
Name

Give this trunk a name to help you identify it.
Interface Type

Specify the interface type according to the trunk specification.

  • E1
  • T1
  • J1
Signaling

Specify the Signaling type PRI.
Framing

Select the frame format for this trunk according to the requirements of your country and carrier. The frame format of the PBX must be the same as that of the carrier. Otherwise, the link cannot be established.

  • When the Interface Type is E1, Framing options are:
    • Enable CRC4
    • Disable CRC4
    Note: CRC4 is a method of checking for errors in data transmitted on E1 trunk lines.
  • When the Interface Type is T1 or J1, Framing options are:
    • ESF
    • D4
Line Code

Choose the line code for this trunk according to the direction provided by carrier.

  • When the Interface Type is E1, Line Code options are:
    • HDB3
    • AMI
  • When the Interface Type is T1 or J1, Line Code options are:
    • B8ZS
    • AMI
Codec
Choose the codec for this trunk.
  • a-law
  • u-law
Echo Cancellation
This option enables or disables echo cancellation.
Note: If an echo occurs during a call, you can enable echo cancellation.
D Channel
Set the channel used to carry control information and signaling information.
  • If Interface Type is set to E1, enter a channel number from 1 to 31.
  • If Interface Type is set to T1 or J1, enter a channel number from 1 to 24.
Switch Type
Configure the switch type according to the direction provided by carrier.
  • If Interface Type is set to E1, Switch Type option are:
    • EuroISDN
    • Q.SIG
  • If Interface Type is set to T1 or J1, Switch Type option are:
    • EuroISDN
    • National 2
    • National 1
    • DMS100
    • AT&T 4ess
    • Lucent 5ess
    • Q.SIG
Signaling Role
Specify whether this interface will act as the user or the network.
  • User: If the service provider acts as the network, the PBX needs to be set as the User.
  • Network: If the service provider acts as the user, the PBX needs to be set as the Network.
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.
Advanced Settings
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.
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.
Reset Interval (s) This sets the time in seconds between restart of unused B channels. The default is "Never".
Note: Set the interval to "Never" if you do not wish the channel to restart.
Carrier Hangup Tone Detection
  • If this option is enabled, you will hear the hangup tone played by your carrier when the other party hangs up. (Please first check with your carrier whether they will send the prompt or not.).
  • If disabled, you will hear the hangup tone played by the system when the other party hangs up.
Dialplan
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 Enable or disable the 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'

MFC/R2 settings

The table below shows the Basic settings and Advanced settings for the E1/T1/J1 trunk (MFC/R2 signaling type).

Setting Description
Basic Settings
Name

Give this trunk a name to help you identify it.
Signaling

Specify the Signaling type MFC/R2.
Framing

Select the frame format for this trunk according to the requirements of your country and carrier. The frame format of the PBX must be the same as that of the carrier. Otherwise, the link cannot be established.

Framing options are:
  • Enable CRC4
  • Disable CRC4
    Note: CRC4 is a method of checking for errors in data transmitted on E1 trunk lines.
Line Code

Choose the line code for this trunk according to the direction provided by carrier.

Line Code options are:
  • HDB3
  • AMI
Echo Cancellation
This option enables or disables echo cancellation.
Note: If an echo occurs during a call, you can enable echo cancellation.
Variant Set the MFC/R2 variant.

  • Argentina

  • Brazil

  • China

  • Czech

  • Colombia

  • Ecuador

  • Indonesia

  • ITU

  • Mexico

  • Philippines

  • Venezuela
Category Set the category of the calling party.

  • National

  • National priority

  • International

  • International Priority

  • Collect Call
MAX DNIS Maximum amount of DNIS to ask for.
Note: If you wish to customize the size, enter the value in the text box directly.
MAX ANI Maximum amount of ANI to ask for.
Advanced Settings
Forced Release Enable or disable forced release of channel.
Note: If the call can not be hung up properly, check this option.
Immediate Accept Most variants of MFC/R2 offer a way to go directly to the call accepted state, by passing the use of group B and II tones. This option enables or disables the use of that feature for incoming calls. The default is unchecked.
Double Answer Block collect calls with double answer. This will cause that every answer signal is changed by answer -> clear back -> answer. The default is unchecked.
Charge Calls Whether to report to the other end "accept call with charge" or not.
Allow Collect Calls Specify whether to accept collect calls or not.
MF Back Timeout (ms) MFC/R2 value in milliseconds for the MF timeout.
Metering Pulse Timeout (ms) MFC/R2 value in milliseconds for the metering pulse timeout. Enter "-1" to use the value.
Incoming DTMF Mode Specify the incoming DTMF mode.
Outgoing DTMF Mode Specify the outgoing DTMF mode.

SS7 settings

The table below shows the Basic settings and Advanced settings for the E1/T1 trunk (SS7 signaling type).

Setting Description
Basic Settings
Name

Give this trunk a name to help you identify it.
Signaling

Specify the Signaling type SS7.
Framing

Select the frame format for this trunk according to the requirements of your country and carrier. The frame format of the PBX must be the same as that of the carrier. Otherwise, the link cannot be established.

Framing options are:
  • Enable CRC4
  • Disable CRC4
    Note: CRC4 is a method of checking for errors in data transmitted on E1 trunk lines.
Line Code

Choose the line code for this trunk according to the direction provided by your carrier.

Line Code options are:
  • HDB3
  • AMI
Codec Choose the codec for this trunk.
Echo Cancellation
This option enables or disables echo cancellation.
Note: If an echo occurs during a call, you can enable echo cancellation.
D Channel

Set the channel used to carry control information and signaling information. Enter a channel number from 1 to 31.
Variant Set the SS7 variant.
  • ANSI: 24 bits

  • China: 24 bits

  • ITU: 14 bits
Linkset Display SS7 linkset numbers.
Network indicator Specify the network indicator according to the network environment.
SLC

Specify the Signal Linking Code.
OPC

Specify the Originating Point Code. This is generally assigned by your carrier.
DPC

Specify the Destination Point Code. This is generally assigned by your carrier.
Advanced Settings
Start CIC No. Specify the Circuit Identification Code number of the first B channel of E1 line (SS7).
Note: The suggested value is the multiples of 32 plus 1, for example: 1, 33, 65.
Calling Party Number Type Specify the calling party number type.
  • National
  • International
  • Subscriber
  • Unknown
Called Party Number Type Specify the called party number type.
  • National
  • International
  • Subscriber
  • Unknown

E&M settings

The table below shows the Basic settings and Advanced settings for the E1/T1/J1 trunk (E&M signaling type).

Setting Description
Name

Give this trunk a name to help you identify it.
Interface Type

Specify the interface type according to the trunk specification.

  • E1
  • T1
  • J1
Signaling

Specify the Signaling type E&M.
Framing

Select the frame format for this trunk according to the requirements of your country and carrier. The frame format of the PBX must be the same as that of the carrier. Otherwise, the link cannot be established.

  • When the Interface Type is E1, Framing options are:
    • Enable CRC4
    • Disable CRC4
    Note: CRC4 is a method of checking for errors in data transmitted on E1 trunk lines.
  • When the Interface Type is T1 or J1, Framing options are:
    • ESF
    • D4
Line Code

Choose the line code for this trunk according to the direction provided by your carrier.

Line Code options are:
  • HDB3
  • AMI
Codec Choose the codec for this trunk.
Echo Cancellation
This option enables or disables echo cancellation.
Note: If an echo occurs during a call, you can enable echo cancellation.

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