Experiencing choppy calls both extension to extension and outbound call

Asterisk Asterisk General
1

Hello community,

recently i bought a dedicated server, bellow is my server specification;

processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 63
model name : Intel(R) Xeon(R) CPU E5-2650L v3 @ 1.80GHz
stepping : 2
microcode : 0x1
cpu MHz : 1799.998
cache size : 30720 KB

MemTotal: 500836 kB

I’ve asterisk-13.6.0, after a successful setup everything seemed to be ok not after when i created two extensions and tried to call another extension, i get a choppy/broken voice, I don’t think it’s my network cos i tried different softphones on different networks, changed different Codec(s), reinstalled but the issue is still the same. I don’t know what to do next, is it my server which is very weak OR? please advice me
thanks

2

checking in…No reply!
please guys help me out

3

Your 24 hours minimum bump time isn’t up yet.

You appear to have excluded the only likely cause.

4

thanks David! if i may ask, what likely other causes, (because i configured asterisk on my personal PC and everything works perfectly…) I don’t know what’s happening with this one
I’ll be grateful if you do pinpoint some of the causes…

5

Running on a virtual machine. Running CPU intensive applications on the same machine.

1 Like
6

hello david, seriously i don’t get what you said, please could you try to explain it to me.
you mean virtual machines can’t get me what i want?
thanks

7

Virtual machines need very careful configuration to achieve under 20ms scheduling latencies and accurate internal times, as they were not, originally, designed for real time applications, like telephony.

8

Hello David, thanks for that little explanation…I’ll only ask you one thing! how would you advice me?what do i need to do inorder to achieve this?
Well, my main aim is to startup a small voip business in my country(uganda), so i need this please. I know how to install/configure asterisk but maybe am missing that little thing. Can you please refer me, somewhere i can read more about this.
thanks

9

Hello David!
I want to thank you for your time and advice good of it, i found out what the problem was. so i just wanted to update it maybe it’ll be useful to someone in the coming time.

Well, i didn’t mention that i was using Digital Ocean servers, so here is the warning I got from someone who was using the same server:

WARNING: If you’re using a 512MB droplet at Digital Ocean, be advised that their setups do NOT include a swap file. This may cause serious problems when you run out of RAM. Uncomment ./create-swapfile-DO line below to create a 1GB swap file which will be activated whenever you exceed 90% RAM usage on Digital Ocean.

Immediately after creating the swap file (i gave it 4GB) every is now normal.

But their is only one issue now am facing. if i use a phone supporting 3G+ network to make a call to another, everything is good and clear, but if i use a phone supporting only Edge network, the calls are not clear at all.

how do I make my pbx to support edge network too just like 3G network.
thanks

10

Edge is unlikely to have enough bandwidth to complete a VoIP call unless using a compressed codec like G729A. As well the latency will make the quality of the call very poor as well.

1 Like