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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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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.

    NOTE:

    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.

    NOTE:

    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.

    NOTE:

    The device supports the BRA trunk from V200R002C02.

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Updated: 2019-08-09

Document ID: EDOC1000079719

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