E1/T1 Trunk Settings

When you configure a E1/T1 trunk, you may need to configure some of the advanced settings. This reference describes all the settings on a E1/T1 trunk.

E1/T1 signaling type

Yeastar S100 and S300 supports the following ISDN signaling type, you can configure the trunk according to the information provided by your service provider.

E1/T1 trunk settings - PRI

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

Settings 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 like the user or the network.
  • User
  • Network

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.
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. The default is checked.
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.
PRI Indication Select the PRI Indication:
  • Inband: Use in-band tones to play busy or congestion signal to the other side.
    Note: Inband is not available on all PRI/BRI subscription lines.
  • Out-of-Band: Use RELEASE, DISCONNECT or other messages with CAUSE to indicate call progress (e.g., cause: unassigned number or user busy).
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.
Enable DNIS Dialed Number Identification Service is a telephone service that enables a company to identify which telephone number was dialed. Users could configure DNIS to allow the IP phones to display which trunk is passing the call.
DID Number The DID number to associate with the trunk. This number is used to identify which line of the trunk is passing the call.
DNIS Name Dialed Number Identification Service is a telephony service used to identify which telephone number was dialed. By enabling this service and configuring a name for this DNIS and the DID number, when a call reaches the configured DID number and the trunk, the name will be displayed on the ringing phone.
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 Calling Party Numbering Plan.
Called Party Numbering Type Select the Called Party Numbering Type.
Presentation Indicator The PI provides instructions on whether or not the provided calling line identity is allowed to be presented, or indicate 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: '(Called Party Numbering Plan: ISDN +)Called Party Numbering Type: International'.
National Prefix Dialplan: '(Called Party Numbering Plan: ISDN +)Called Party Numbering Type: National'.
Local Prefix Dialplan: '(Called Party Numbering Plan: ISDN +)Called Party Numbering Type: Subscriber'.
Private Prefix Dialplan: 'Called Party Numbering Plan: private + Called Party Numbering Type: Subscriber'.
Unknown Prefix Dialplan: '(Called Party Numbering Plan: ISDN +)Called Party Numbering Type: Unknown'.

E1/T1 trunk settings - MFC/R2

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

Settings 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 Max amount of DNIS to ask for.
Note: If you wish to customize the size, enter the value in the text box directly.
Advanced Settings
Enable DNIS Dialed Number Identification Service is a telephone service that enables a company to identify which telephone number was dialed. Users could configure DNIS to allow the IP phones to display which trunk is passing the call.
DID Number The DID number to associate with the trunk. This number is used to identify which line of the trunk is passing the call.
DNIS Name Dialed Number Identification Service is a telephony service used to identify which telephone number was dialed. By enabling this service and configuring a name for this DNIS and the DID number, when a call reaches the configured DID number and the trunk, the name will be displayed on the ringing phone.
Forced Release Enables or disables forced release of channel.
Note: If the call can not be hanged up properly, check this options.
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 or not report to the other end "accept call with charge".
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 DTME Mode Specify the outgoing DTMF mode.
First Number to Get Choose which number to get first.
  • DNIS

    Get the DNIS number first and then get the ANI number.

  • ANI

    Get the first digit of DNIS number, then get the ANI number, and finally get the remaining DNIS digits.

E1/T1 trunk settings - SS7

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

Settings 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 Define 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
Enable DNIS Dialed Number Identification Service is a telephone service that enables a company to identify which telephone number was dialed. Users could configure DNIS to allow the IP phones to display which trunk is passing the call.
DID Number The DID number to associate with the trunk. This number is used to identify which line of the trunk is passing the call.
DNIS Name Dialed Number Identification Service is a telephony service used to identify which telephone number was dialed. By enabling this service and configuring a name for this DNIS and the DID number, when a call reaches the configured DID number and the trunk, the name will be displayed on the ringing phone.
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 calling party number type.
  • National
  • International
  • Subscriber
  • Unknown

E1/T1 trunk settings - E&M

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

Settings 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.

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.
Advanced Settings
Enable DNIS Dialed Number Identification Service is a telephone service that enables a company to identify which telephone number was dialed. Users could configure DNIS to allow the IP phones to display which trunk is passing the call.
DID Number The DID number to associate with the trunk. This number is used to identify which line of the trunk is passing the call.
DNIS Name Dialed Number Identification Service is a telephony service used to identify which telephone number was dialed. By enabling this service and configuring a name for this DNIS and the DID number, when a call reaches the configured DID number and the trunk, the name will be displayed on the ringing phone.

Adapt Caller ID

The incoming caller ID that matches the adaptation pattern will be adapted, so that you can press the call record directly on your phone call back a number.

For more information, see Change Inbound Caller ID.

Navigation path: Settings > PBX > Trunks, edit a trunk on the Adapt Caller ID tab.

Settings Description
Patterns The following characters have special meanings:
  • X matches the numbers 0- 9;
  • Z matches the numbers 1-9;
  • N matches the numbers 2- 9;

  • [12345-9] matches the numbers in the bracket (in this example, 1, 2, 3, 4,5, 6, 7, 8,

    9);

  • Wildcard matches one or more numbers. E.g. "9011." matches anything starting with 9011 (excluding 9011 itself);

  • Wildcard "!" matches none or more than one numbers. E.g. "9011T matches anything starting with 9011 (including 9011 itself);
Strip Strip allows you to specify the number of digits that will be stripped from the front of the Caller ID before the call is displayed. For example, if the incoming Caller ID is 05929999999, but you need to dial number 5929999999 to call back, one digit should be stripped.
Prepend These digits will be prepended to the Caller ID before the call is displayed. For example, if the incoming caller ID is 5929999999, but you need to dial digit 0 before the number to call back, 0 should be prepended.