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AR Router Troubleshooting Guide

This Product Documentation provides guidance for maintaining AR Enterprise Router, covering common information collection and fault diagnostic commands, typical fault troubleshooting guide, and troubleshooting.
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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).
What Are Trunks?

What Are Trunks?

A trunk is a logical link between two exchange offices. Inter-office calls must be transmitted by trunks. The device supports the following trunk modes:
  • PRA trunk

    A PRA trunk is connected to a VE1 interface and is usually used to connect two PBXs.

  • AT0 trunk

    An AT0 trunk is connected to an FXO interface for accessing the PSTN network. The PBX enterprise needs to use the AT0 trunk for making calls to non-enterprise numbers or making long-distance fixed-line calls.

  • SIP trunk

    A SIP trunk is established on an IP link and connects a PBX and an IMS. There are three types of SIP trunks: SIP AT0 trunk, AIP PRA trunk and common SIP trunk.

  • E1R2 trunk

    The E1R2 trunk is bound to VE1 interfaces and is usually used to connect two PBXs. The E1R2 trunk can be connected to a peer device using R2 signaling.


    The device supports the E1R2 trunk from V200R002C00.

  • H323 trunk

    An H323 trunk is established on an IP link. It connects a PBX and an IMS or connects PBXs in different areas.


    The device supports the H323 trunk from V200R002C01.

  • BRA trunk

    A BRA trunk is bound to a BRA interface and connects a PBX and an ISDN.


    The device supports the BRA trunk from V200R002C02.

Updated: 2019-08-09

Document ID: EDOC1000079719

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