Softswitch performance

General information

Performance results in the following conditions (recommended hardware is used, SIP protocol, no transcoding, CPS is low (<5), GUI/DB on another server, other processes than calls are not in use) are:

• MOR - 500 concurrent calls*
• M2 - 1000 concurrent calls*

'* We cannot guarantee such amount of concurrent calls as many factors influence it:

• 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

If you need better performance than single server solution can offer, you should use multi-server implementations.

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:

• 2 SIP balancers (in redundancy)
• 3 Asterisk (MOR) servers
• 2 DB/GUI server (with MySQL replication, redundancy)

Results: up to 1000 concurrent calls, up to 1500 call attempts per minute (25 CPS)

Wholesale transit business #2

Implementation:

• 1 Asterisk (MOR) + DB + GUI server

Note: 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)

Retail business #1

Implementation:

• 1 Asterisk (MOR) server
• 1 DB + GUI server

Note: main business - incoming calls through DIDs
Results: up to 100 concurrent calls, up to 50 call attempts per minute (1 CPS)

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?