Support FAQs

Solutions, frequently asked questions and known issues.

Fax over IP
Faxing over VoIP is a challenge. In reality, there are a number of reasons, and no certain universal cures. VoIP networks are designed to do a good job with...
Fri, 27 Jul, 2018 at 7:42 PM
Codec and ptime selection
The amount of bandwidth used for each call depends mostly on your selection of codec. The following codecs and their approximate bandwidth utilization (incl...
Fri, 27 Jul, 2018 at 7:42 PM
Configuring Linksys or Sipura ATAs
Linksys has a line of consumer-grade ATAs (Analog Telephone Adapters) that are easy to deploy. This article is about setting them up with Teliax. Note - Mo...
Fri, 27 Jul, 2018 at 7:42 PM
Problems introduced by routers with SIP ALG
What's a SIP ALG? Many of today's commercial routers implement SIP ALG (Application Layer Gateway), coming with this feature enabled by default. ...
Fri, 27 Jul, 2018 at 7:42 PM
I changed nothing. Why is it broken?
It worked yesterday. Calls were coming in and going out just fine.  Now, all of a sudden, it’s stopped working (or The Quality Is Bad, or They Can’t Hear Me...
Fri, 27 Jul, 2018 at 7:42 PM
Troubleshooting on your own
Here's a few things you can try on your own to get your PBX back up and running. Is your account active? Reload your PBX or powercycle your ...
Fri, 27 Jul, 2018 at 7:42 PM
Dialed number information service (DNIS)
DNIS, or Dialed Number Information Service lets your PBX know which number someone called in on. It's useful if you have multiple phone numbers belongi...
Fri, 27 Jul, 2018 at 7:42 PM
Dual-tone multi-frequency (DTMF), or TouchTones
DTMF allows key-presses on inbound and outbound calls to be recognized by a phone system capable of decoding and registering these tones. This is useful for...
Fri, 27 Jul, 2018 at 7:42 PM
About caller ID name and number
How Caller ID Works Most phone subscribers are familiar with the concept of Caller ID, also known as CNAM (Caller ID Name). At the very least, most phone...
Fri, 27 Jul, 2018 at 7:42 PM
SonicWALL and SIP
The SonicWALL security appliance allows VoIP phone and applications to be deployed behind the firewall. The VoIP > Settings page includes the settings fo...
Fri, 27 Jul, 2018 at 7:42 PM