IP-PBX is no more a new technology. It is pretty much everywhere now. It is such a success that traditional PBX manufacturers are now manufacturing IP-PBXs however they lost their edge or should it be called monopoly.
What is an IP-PBX
Private Branch eXchange is by all means your own telephone exchange. Customers are your local extensions and yes you can even bill them. Lines interfacing with your local area telephone exchange a.k.a telco are trunks to your PBX. That is not all; having your own PBX gives you freedom for tons of features which otherwise are either expensive or not possible at all from your regular telco. You can even connect your PBXs hard-wired or over LAN/WAN networks, connecting your branches.
What IP-PBX is not
IP-PBX is not a PBX over VoIP alone. IP PBX is not a parallel system along with traditional PBX rather it is an upgrade to traditional one by including programmable features and media over IP. Last but not least IP-PBX is not expensive.
How do we do it
We deploy PBX software (Asterisk or Freeswitch) on a computer machine which turns it into a state-of-the-art IP PBX. To interface with national telco company special hardware is used mostly PCI cards or external devices. Key to its success is its server grade operating system which is Linux (CentOS). It is significant to mention that carriers who have processed billions of calls in a decade are running computer based PBXs.
For large companies we deploy PBX clusters for load balancing as well as if fail-over (Linux-HA) is required. Other services include custom programming to meet your very specific needs; as well as billing quota system (A2billing).
Time and Date Routing
Ability to route calls based on time of day, day of week or date etc. Call diverted to Voice mail or to your mobile phone in off-office hours and on main IVR during working hours, for example.
(IVR = Interactive Voice Response): Play back of messages like “Welcome to company abc. Press 1 to reach sales…” and then routing calls accordingly. In IP-PBX there is no limit on sub-levels or number of IVRs. IVR can route the call to a queue, phone, sub-ivr, voicemail, voice message, external number, disa or to another software application which can do any other thing you like it to do, for example query the database and playback result etc.
Help desks, sales desk need one of these. Callers can listen to some good music and company advertisements while they wait for an operator. However for help desk oriented businesses we highly recommend VICIdial
which is based on same PBX.
These are the slots where other party can listen to some music when you put them on hold until you get back to them from same phone or from another phone.
It plays back a message like “NAME is not available please record your message after the beep…”. Mr. NAME can retrieve recordings from his phone, web portal as sound file or from email inbox if voice mail as email feature is activated.
More than one carriers can be interfaced with PBX. With the help of simple number patterns appropriate trunk can be selected for outbound calls. PBXs are connected with each other on same principle. PBX-1 can have extensions in 1XX format while PBX-2 in 2XX format. So when they call each other it is practically seamless.
Administration through web interface. Even operator panel although you can use a IP-phone with extension modules for the same.