Can I reduce the PABX's reliance on DNS in case my DNS server dies?

What firewall ports do I need to configure?

Can I use a SIP phone directly over the Internet back to my PABX?

Can I use "VoIP service", and how do I configure it?

General network considerations, DNS, DHCP, Gateways

SIP outbound calls do not hear a ringtone

How do I enable Remote access for IPCortex support team

How do I enable SSL (HTTPS) on the PBX Web interface

web interface

The web interface won't log me in.

OCM/Keevio Handset Control from PABX version 4.0.10 onwards


PABX firmware Upgrades - Additional notes

How to configure Siemens Gigaset DECT devices

How to configure Polycom IP Phones

How to configure Bria Softphone

How to configure X-Lite 2.0 for Linux

How to configure Linksys ATA devices

How do I integrate with Microsoft Lync?


Can you suggest a door-entry phone that works with the PABX?

What is the best way to implement a large DECT install?

The manual says our phone can be auto provisioned, but it is not working.

I cannot log-on to the web interface of my phone. What is the username and password?

I hear pops hisses and/or pauses when talking on my phone.

Phones periodically report 'NR' or 'No Service' / All my phones have stopped working

If I transfer a call to a softphone it hangs up after 30 seconds

When I talk on my phone/headset, people say I sound very quiet

I use a headset on my phone, and can hear lots of humming or buzzing.

I do not get caller ID on inbound calls.

I do not get the correct caller ID on outbound calls.

Can I use my mobile phone as a SIP Phone on your PABX?

My phone is in a reboot loop. How do I fix this?

I lose my manually added contacts when my phone is restarted?

Can I use a PDQ or modem device on an ATA?

Which phones are hearing aid compatible?


We are using a soft-fax, and some people can never get a fax to us.

We are using a FAX machine on an ATA, and it is unreliable. What can we do?

I've heard about using T.38 for faxes on digital systems. What is it, and can it help?

Is there an email-to-fax facility on the PABX?

inbound calls

Inbound calls do not work.

I get silence if an inbound SIP call is routed out again.

outbound calls

I cannot dial 100 to get the operator

I want to use a VoIP channel by default. How?

How can I calculate correct charges for calls made over the IPCortex VoIP service?

My caller ID is sometimes sent incorrectly on ISDN.

call recording

When will a call record, or not record?


Email notifications of voicemail or faxes is not working


I dial 8500 to pickup voicemail but nothing happens


Can I automate pulling a backup from the systems

Can the system do automatic backups?