[asterisk-users] Problems with the voice quality under load

2015-03-02 Thread Mordechay Kaganer
B.H. Hello, all :-) We have a cluster of Asterisk (v. 11.9) servers that host IVR applications. The servers work behind SIP proxy (kamailio) for load balancing. All servers are in 2 processor configuration, 8-10 cores per CPU. When a particular server gets about 500 concurrent calls, the sound

Re: [asterisk-users] Problems with the voice quality under load

2015-03-02 Thread Steve Edwards
On Mon, 2 Mar 2015, Mordechay Kaganer wrote: When a particular server gets about 500 concurrent calls, the sound quality begins to degrade, the sound plays slowly and with clicks. As far as i understand, it's because asterisk is unable to send the voice stream in time i.e. the server is overlo

Re: [asterisk-users] Problems with the voice quality under load

2015-03-02 Thread Ron Wheeler
Have you done the math for the network connections? BTF and external What bit rates for the sound? What codecs? How are calls coming in - SIP - analogue Disks OK(low IO per second)? Caching working OK? CPU may not be the problem if your CPU utilization is really that low. Ron On 02/03/2015 10:

Re: [asterisk-users] Problems with the voice quality under load

2015-03-02 Thread A J Stiles
On Monday 02 Mar 2015, Mordechay Kaganer wrote: > When a particular server gets about 500 concurrent calls, the sound quality > begins to degrade, the sound plays slowly and with clicks. As far as i > understand, it's because asterisk is unable to send the voice stream in > time i.e. the server is

Re: [asterisk-users] Problems with the voice quality under load

2015-03-02 Thread Mordechay Kaganer
B.H. Hi, really thanks for all the relies :-) Here's my answers: On Mon, Mar 2, 2015 at 5:56 PM, Ron Wheeler wrote: > Have you done the math for the network connections? BTF and external > What bit rates for the sound? > What codecs? > How are calls coming in - SIP - analogue > > Disks OK(low