voip pabx technical faq

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 XXX's VoIP service, and how?

web interface

The web interface won't log me in.

configuring

How to configure Siemens Gigaset C460IP or C450IP

How to configure Siemens Gigaset S450IP / S685IP

How to configure Polycom IP Phones

How to configure directed pickup on a Linksys SPA962 with SPA932 sidecar

How to configure X-Lite 2.0 for Linux

How to configure Linksys ATA devices

The Linksys range of ATA devices should auto-configure on the IP Cortex PABX. At present we support the SPA1001, SPA2002, SPA2102 and PAP2T. Sometimes they need some coaxing to collect their configuration as follows:

Plug the ATA into the network, power, and a phone handset, and wait until the flashing lights have settled. Dial "****" on the phone, and wait for the voice prompt. Dial "73738#" and wait for the next voice prompt. Dial "1". The unit will reset to factory defaults.

You now need to wait between 30 seconds and 5 minutes for the unit to collect its initial configuration. This will become apparent when the device appears on the phone-hardware screen of the PABX Web-UI. It will probably also get a dialtone on the handset at this stage.

Once the device is on the PABX, rename the ports to something more meaningful than the MAC address, and associate the device with the correct user. Then repeat the reset cycle once more as above.

After a wait of up to 5 minutes, the dial-tone should return on the handset which should now be fully configured and working.

How to configure Linksys ATA devices to support "Hook Flash" (The "R" button for trnasferring calls)

How to configure Xorcom Astribank 8

phones

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.

What version of firmware should I have on my phone?

I cannot transfer calls / Transferred calls are dropped / Transferred calls don't ring for long enough to be answered.

I do not get caller ID on inbound calls.

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

Can I use my Nokia E61 phone as a SIP Phone on your PABX?

fax

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.

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?

The calling number (CLI) is being sent correctly for most of my calls, but sometimes the called party sees the call coming from lowest DDI in my range instead. What can I do to fix this?

email

Email notifications of voicemail or faxes is not working

voicemail

I dial 8500 to pickup voicemail but nothing happens