Hosted Voice & PBX

    Interoperability Testing Checklist

    The VoIP Help Page Team·1 min read·Last updated: March 14, 2026

    ### Scope

    The function of this checklist is to test all scenarios in which there may be interoperability in service using Asterisk 2.3 - 4.0, Cisco IAD trunk and extensions, Obi ATAs, and 3CX.

    Requirements

    • Access to Equipment

    • Access to Extension for testing

    • Physical and Logical Network Layout

    • Make, Model and Software Version of Equipment Testing

    • Extension remains registered for more than 5 min

    • Two Way Audio

    • DTMF

    • Picking up calls, placed on hold or in parking lot

    • Transferring calls to other extensions

    • Access to voicemail

    • Being on a call for more than 30 min

    • Call not ending when Extension is hung-up (Desk Ext & Mobile Ext)

    • Call Forwarding

    • Show different outbound caller ID

    • CNAM shows correctly

    • Picking up other extensions' calls from another extension

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