Redundancy Asterisk Configuration

Here describes a working solution to implement a redundant asterisk PBX system.

When we design a redundant PBX solution, it is intuitive to think of building two Asterisk nodes with some kind of synchronization mechanisms ranging from simple scripts to more complicated HA cluster.

The more challenging task is to failover the PSTN connection when the primary node is down.

The TwinStar solution from Xorcom is directly addressing this problem.

This solution is comprised of two Asterisk servers with identical configuration in active-standby mode and one Astribank channel banks for PSTN connection .

The Astribank provides FXO or T1 connection with telco provider. It communicates via USB with the two Asterisk servers and continuously monitors the function of the primary node. Upon detecting node failure, it instantly passes control to the backup server. This architecture ensures communication in the organization is re-established in short time.

Further information can be found in here


How to setup virtual presence in Hong Kong

Hong Kong is the Asia hub providing numerous opportunities for you to develop business in the most promising economy sectors.

A Hong Kong local phone number would be very useful to kick off your business here and in fact, you could establish your virtual presence conveniently by subscribing to a licensed HK DID SIP trunk service provider .   

The DID stands for direct inward dialing and describes the functionality to receive call.  SIP is the industry standard for handling calls over internet.  In essence, the provider is using SIP technology to let you receive and send calls using a HK number even you are not physically in HK.

They will give you a local HK number and route all incoming calls to this HK number via internet to your overseas office or call center.  In the simplest way, you just need a IP phone in order to receive calls from and dial out via the HK number.

When you have multiple HK DID numbers or a team of agents to answer calls, you need a SIP-based telephone system for distributing and logging the calls.  These systems usually provide other value-added features like IVRS, conversation recording and follow-me.  Sophisticated ones could even allow you to monitor your agents on-the-fly and gather useful performance statistics.
There are a variety of such systems in the market, such as Asterisk, Elastix or FreePBX.