Implementations

This page shows some ways how MOR system can be used. Examples are from real implementations.

On all implementations listed below, it's recommended to deploy Asterisk and DB servers in the same datacenter. This will ensure stable system functioning.

Even though it's possible to deploy these elements in different locations, but such implementations may cause many issues, related with delays between different networks.

For M2 implementations please check here

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Redundancy between two data centers

There's always a risk that data center in which you keep your servers can be down for various reasons.

To reduce such risk you can consider implementing redundancy between two data centers that are located in different countries or continents.

However, such implementation can work only if both data centers can meet requirements which are described here (see Redundant servers).

The most common problem is that different data centers cannot ensure such requirements for Virtual IP.

1 Server Basic System

This is a very basic solution All-in-one-Server. No redundancy, no High-Availability, no Scalability.

We recommend to use it only in the testing environment.

Not safe to use in the real business environment.

2 Servers Solution with 2 IP Addresses

The solution allows placing two servers in different locations.

In case of broken connection or broken database replication between servers, each site will become separated systems and runs its own billing, which is not desirable in most cases.

It provides double capacity with increased risk of malfunctioning in case of hardware/software/network failure.

2 IP Addresses allows route balancing at the side of the customers/vendors. They will use 2 IPs to balance traffic on their side.

2 server redundant solution

This is the most popular solution because it is fully redundant and most stable.

More info: 2 server redundant solution

4 server redundant solution

Stable and redundant solution for high performance.

More info: 4 server redundant solution

4 server solution in Italy with 16 E1

• Such system is in Italy serving Call Shops
• E1 hardware is 2 x Sangoma A108DE cards
• This implementation is used for high volume calls to/from PSTN network over 16 E1 links were 4+4 E1 is for incoming and 4+4 E1 is for outgoing (on Asterisk 1 server 4 incoming/4 outgoing and same on server Asterisk 2).
• Separate server is dedicated to database which minimizes load on Asterisk servers.
• GUI is on separate server with it's own DB connected to main DB server over MySQL Replication.

Many Asterisk servers with DB Replication

SIP Balancer solutions

Minimal structure without redundancy

NOTES:

• GUI is on Asterisk/DB servers
• When Proxy server (OpenSIPS) crashes, all system is down -> no redundancy, not recommended in production, good for testing
• DB (Asterisk/GUI) servers share 1 IP also managed by Heartbeat
  • Setup without Heartbeat also is possible, but this introduces 1 more point of failure (DB server), but simplifies the setup, thus allowing faster setup for testing

Minimal structure for full-redundancy

NOTES:

• GUI is on Asterisk/DB servers
• Proxy servers share 1 IP managed by Heartbeat
• DB (Asterisk/GUI) servers share another 1 IP also managed by Heartbeat

Multiple Asterisk servers, high performance system with SIP balancer and DB Replication

• SIP balancer
• If one of Asterisk servers fails, SIP balancer routes calls via remained Asterisk servers.
• LinuxHA heartbeat monitors Database servers
  • When Main Database fails - Backup Database sees that and after 10s (default) will take Virtual IP, it is done automatically.
  • When Main Database is back up - Backup Database returns Virtual IP to Main Database and system starts to function in normal work flow (done automatically).
• GUI server is connected to Backup Database to avoid load on Main Database in normal work flow.

This solution can handle up to 1000 simultaneous calls. Certain amount of calls may vary depending on hardware, codecs used and transcoding. Additional Asterisk servers can be added if larger amount of simultaneous calls is needed.

Complete Redundancy, high performance system with SIP balancer

Detailed schematic of SIP Proxy solution:

NOTES:

• GUI is on DB servers
• Proxy servers share 1 IP managed by Heartbeat
• DB (Asterisk/GUI) servers share another 1 IP also managed by Heartbeat
• More Asterisk Nodes can be connected, example with 2 is bare minimum

For more details about SIP Balancer solution click here