3CX System reserved extensions

Discussion in '3CX Phone System - General' started by angeltfmx, Jun 2, 2016.

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  1. angeltfmx

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    What is the complete list of system reserved 4 digit extension? I know for sure I cannot use 8888 for VM...
    Using 3CX v14

    Thanks,
    Angel
     
  2. leejor

    leejor Well-Known Member

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    Haven't come across a complete list of all reserved numbers. In many cases it will depend on what services you are actually using (how many ring groups, etc., that get assigned a number). I seem to recall that I wasn't able to have an extension that began with a zero, but that may have changed in V14. Many new systems just start numbering with 2XXX, 3XXX, 4XXX and so on, saving the upper digits for access to certain trunks. Unless you are deploying massive system, that is 1000 extensions per prefix.
     
  3. pact

    pact New Member

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    System Status -> System Extensions will tell you.

    8888 will be the default FAX Extension
    7777 will be the default IVR Extension
    7000 will be the default Conference Room Extension
    9999 will be the 'Special Menu' which is generically the Extension / Voicemail Menu

    IVR, Ring Group and Call Queues usually start at the 8xxx range (But can be customized).

    Others, as leejor stated, will be dependant on what Ring Groups, Call Queues and IVRs you have configured.
     
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  4. NickD_3CX

    NickD_3CX Support Team
    Staff Member 3CX Support

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    The 9999 which is the default VMail extension can also be changed.
     
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