No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search


To have a better experience, please upgrade your IE browser.


CLI-based Configuration Guide - Interface Management

AR100, AR120, AR160, AR1200, AR2200, AR3200, and AR3600 V300R003

This document provides the basic concepts, configuration procedures, and configuration examples of the interfaces supported by the device.
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Configuring a CT1/PRI Interface (PRI Mode)

Configuring a CT1/PRI Interface (PRI Mode)

To connect a device to an ISDN network using an ISDN PRI interface, configure the CT1/PRI interface to work in PRI mode

Pre-configuration Tasks

Before configuring a CT1/PRI interface, complete the following task:

  • Install a 1E1T1-M/2E1T1-M interface card on the router and ensuring that it is registered successfully.


All parameters except the clock mode of CT1/PRI interfaces on both ends must be the same. Otherwise, errors may occur during communication.


  1. Run system-view

    The system view is displayed.

  2. Configure the 1E1T1-M/2E1T1-M interface card to work in CT1/PRI mode.

    1. Run display device

      Information about the 1E1T1-M/2E1T1-M interface card is displayed. You can check the slot ID of the interface card, whether the interface card is installed in the slot, and whether it is working properly.

    2. Run display workmode { slot slot-id | all }

      The working mode of the 1E1T1-M/2E1T1-M interface card is displayed.

    3. Run set workmode slot slot-id e1t1 t1-data

      The 1E1T1-M/2E1T1-M interface card is configured to work in CT1/PRI mode.

      By default, a 1E1T1-M/2E1T1-M interface card works in CE1/PRI mode (e1-data).

      After completing this step, reset the 1E1T1-M/2E1T1-M interface card and wait for a while for the configuration to take effect.


      The 4E1T1-M/8E1T1-M interface card only works in CE1/PRI mode (e1-data) and does not support working mode switching.

  3. Run controller t1 interface-number

    The specified CT1/PRI interface view is displayed.

  4. Run pri-set [ timeslot-list list ]

    Timeslots of the CT1/PRI interface are bundled to form a PRI set.

    After you perform this step, the system automatically creates a serial interface. This interface has the same logical features as a synchronous serial interface and is called an ISDN PRI interface. The number format of the ISDN PRI interface is serial interface-number :23. interface-number specifies the number of a CT1/PRI interface. You can configure other parameters on the ISDN PRI interface, including DCC parameters, PPP and PPP authentication parameters, and NAT.

  5. Configure other parameters on the CE1/PRI interface.

    • Run description text

      The interface description is configured.

    • Run cable { long { -7.5db | -15db | -22.5db } | short { 133ft | 266ft | 399ft | 533ft | 655ft } }

      The attenuation or length of the transmission line matching the CT1/PRI interface is configured.

      The default attenuation of the transmission line on a CT1/PRI interface is -7.5 dB.

      When signals that the router receives are of a good quality, use the default configuration.

    • Run clock { master | slave }

      The clock mode is set.

      By default, a CT1/PRI interface works in slave clock mode and uses line clock signals.

      When a CT1/PRI interface functions as a Data Circuit-terminating Equipment (DCE) interface, it must work in master clock mode and provide clock signals for a Data Terminal Equipment (DTE) interface. When a CT1/PRI interface functions as a DTE interface, it must work in slave clock mode and obtain clock signals from a DCE interface.

    • Run alarm-threshold { ais { level-1 | level-2 } | lfa { level-1 | level-2 | level-3 | level-4 } | los { pulse-detection value | pulse-recovery value } }

      Alarm thresholds are configured for the CT1/PRI interface.

      The default alarm thresholds are as follows:
      • AIS alarm: level-1.
      • Loss of frame alignment (LFA) alarm: level-1.
      • Loss of Signal (LOS) alarm: The value of pulse-detection is 176 and the value of pulse-recovery is 22, indicating that a LOS alarm is generated if less than 22 pulses are detected within 176 pulse intervals.
    • Run frame-format { esf | sf }

      The frame format is set.

      By default, a CT1/PRI interface uses ESF as the frame format.

    • Run idlecode { 7e | ff }

      The line idle code is set.

      By default, a CT1/PRI interface uses the line idle code 0x7e.

    • Run itf { number number | type { 7e | ff } }

      The interframe filling tag and the number of interframe filling tags are set.

      By default, a CT1/PRI interface uses the interframe filling tag 0x7e and four interframe filling tags.

    • Run data-coding { inverted | normal }

      Data inversion is configured.

      By default, a CT1/PRI interface does not invert data.

    • Run detect-rai

      RAI detection is configured.

      By default, RAI detection is enabled on a CT1/PRI interface.

Verifying the Configuration

  • Run the display controller t1 interface-number command to check the status and parameters of the specified CT1/PRI interface.
  • Run the display interface serial interface-number command to check the status and packet statistics on the specified serial interface.
Updated: 2019-03-06

Document ID: EDOC1100069331

Views: 21245

Downloads: 95

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Previous Next