King Computer Solutions

Posts Tagged VOIP


How to configure Busy Lamp Field BLF on Linksys SPA942 with asterisk to show other line status

If you are using a Linksys SPA942 and would like to enable viewing of other users status, or be able to press a button to call that extension here is how to configure Make sure you have the latest phone firmware 6.1.5(a). Connect to the web interface on the SPA942 and under the info tab […]


Turn off using cellular mobile data and using VOIP when overseas to save money on an iPhone

We have had a few clients subsequent from coming back from overseas tell us about –


Call forward to mobile cell phone rings and can answer but has no sound on asterisk server

If running your asterisk server behind a firewall you may experience these symptoms: internal users can call mobile extensions configured with follow me and the call goes through and can be heard with no problem. If you have a rule configured so that external callers after a timeout calling internal extensions are then routed to […]


Configure Acrobits SIP iphone app to externally access 3CX VOIP server so RTP voice traffic works

If you are trying to get Acrobits SIP phone working on your iPhone with the 3CX VoIP telephone system use the settings indicated below. For the domain entered the local network DNS name of the server i.e. what is used to connect to 3CX on the local network. For Register via leave the default setting […]


Configuring external SPA942 IP SIP phone with 3CX

The instructions “How can I use the 3CX Tunnel with a SIP hardphone?” on the 3cx site at–


What VOIP ports to open and forward for 3CX

3CX needs the following ports forwarded to the VOIP server in order to work. The documentation does not by default describe which ones are meant to be TCP and which UDP so here they are: Port 5060 (TCP and UDP) – Used for SIP protocol transmission


Installing Windows 3CX VOIP telephone system with Pennytel

Configuring Pennytel as a VOIP provider After the intial 3CX-


Installing Windows 3CX VOIP telephone system with Pennytel – Part 1

I have been configuring a 3CX Windows Voice over IP phone system. We use an Asterisk VOIP system in the office but I thought I would have a look at windows based VOIP system. 3CX offer a free edition for up to 4 simultaneous lines, but the enterprise version for more lines is still under […]