Softswitch performance

What is the maximal single server performance?

Max. performance of single server solutions (real examples):

• MOR - 500 concurrent calls*, 25 CPS (see: wholesale transit business #2)
• M2 - 2000 concurrent calls*, 100 CPS (see: wholesale transit business #3)

Once you reach limits of a single server, it is recommended to deploy a multi-server solutions.

What is the maximal multi-server performance?

• MOR - 1200 concurrent calls* (see: wholesale transit business #1)
• M2 - 6000+ concurrent calls* (see: wholesale transit business #4)

We have not implemented bigger systems than above, so it is not possible to show or predict performance results if you add more servers.

Factors that influence softswitch performance

• Hardware specifications (CPU, RAM, HDD type - 5400/7200 rpm, SSD, SAS, Raid, etc.)
• Network (routers/switches)
• Providers (connectivity, quality, PDD)
• CPS (if you accept a lot of short calls at the same time (so called dialer or call center traffic), softswitch performance decreases)
• Structure of call (signalling only or signalling with media)
• Processes, running on the same time (if you generate invoices, statistics or run other processes, softswitch performance decreases)
• Additional functionality usage (if you record calls, use different IVR structures, softswitch performance decreases)
• Codec and protocol used
• Protocol and codec conversion (in case of transcoding performance decreases two times)
• Calls length (if you accept a lot of short calls at the same time (so called dialer or call center traffic), softswitch performance decreases)
• DB and GUI on same server or on the separate (if you separate DB and GUI, you can increase performance)
• SIP balancer present or not (if you use SIP balancer in front of the servers, you can increase performance)
• Business model (Calling Card, Callback and Call Center calls decreases softswitch performance)
• etc

See also: How do you select a softswitch based on concurrent calls?

Real examples

In all of below examples companies are using recommended hardware.

Wholesale transit business #1

Implementation (Kolmisoft Hosted servers are used):

• SIP balancer
• 3 Asterisk (MOR) servers
• DB/GUI server

Results: 1200 concurrent calls, up to 1500 call attempts per minute (25 CPS)

Wholesale transit business #2

Implementation - single server solution (GUI is not used almost at all, server has 24 cores).
Results: up to 500 concurrent calls, up to 1500 call attempts per minute (25 CPS)

Wholesale transit business #3

Server details: CPU: Intel(R) Xeon(R) CPU E5-2630 v4 @ 2.20GHz RAM: 32 GB HDD
Results: up to 2079 concurrent calls, 6000 call attempts per minute (~100 CPS)

Wholesale transit business #4

Implementation (Kolmisoft Hosted servers are used):

• SIP balancer
• 5 Freeswitch (M2) servers
• DB/GUI server

Results: 3700 concurrent calls, up to 3500 call attempts per minute.

Calling Cards and Retail business #1

Implementation:

• 1 Asterisk (MOR) + DB + GUI server

Note: main business - calling cards and retail
Results: up to 100 concurrent calls, up to 800 call attempts per minute (13 CPS)

See also

• Recommended hardware
• Results of MOR stress tests
• Results of M2 stress tests
• How do you select a softswitch based on concurrent calls?
• Performance Suggestions