Advice on net/asterisk

[Janos Dohanics]

On Tue, 3 Mar 2015 11:19:30 -0600
Adam Vande More <amvandemore at gmail.com> wrote:

> On Tue, Mar 3, 2015 at 9:07 AM, Janos Dohanics <web at 3dresearch.com>
> wrote:
> 
> > Hello List,
> >
> > I'm considering to use net/asterisk for an office with 10-12 phones.
> > I'd welcome your suggestions, advice, tips, comments...
> >
> 
> Are you planning on PRI or SIP?

I'm not sure how to make an educated decision on this, that is, if we
could get by with SIP. I tried http://www.voipqualitytest.com/ and this
is what it shows:

1. Random time during work day:

Speed test statistics
---------------------
Download speed: 10537 kbps
Upload speed: 1115 kbps
Download consistency of service: 64 %
Upload consistency of service: 67 %
Download test type: socket
Upload test type: socket
Maximum TCP delay: 118 ms
Average download pause: 1 ms
Minimum round trip time to server: 54 ms
Average round trip time to server: 57 ms
Estimated download bandwidth: 13651 kbps
Route concurrency: 1.2954974
Download TCP forced idle: 33 %
Maximum route speed: --

VoIP test statistics
--------------------
Jitter: you --> server: 1.1 ms
Jitter: server --> you: 24.5 ms
Packet loss: you --> server: 0.0 %
Packet loss: server --> you: 0.0 %
Packet discards: 0.0 %
Packets out of order: 0.0 %
Estimated MOS score: 3.6

2. Same, after introducing additional outgoing traffic:

Speed test statistics
---------------------
Download speed: 10920 kbps
Upload speed: 705 kbps
Download consistency of service: 85 %
Upload consistency of service: 51 %
Download test type: socket
Upload test type: socket
Maximum TCP delay: 71 ms
Average download pause: 1 ms
Minimum round trip time to server: 54 ms
Average round trip time to server: 87 ms
Estimated download bandwidth: 12194 kbps
Route concurrency: 1.116652
Download TCP forced idle: 51 %
Maximum route speed: --

VoIP test statistics
--------------------
Jitter: you --> server: 8.7 ms
Jitter: server --> you: 3.6 ms
Packet loss: you --> server: 2.0 %
Packet loss: server --> you: 0.0 %
Packet discards: 0.0 %
Packets out of order: 0.0 %
Estimated MOS score: 2.5

3. And with incoming traffic:

Speed test statistics
---------------------
Download speed: 9693 kbps
Upload speed: 1465 kbps
Download consistency of service: 48 %
Upload consistency of service: 66 %
Download test type: socket
Upload test type: socket
Maximum TCP delay: 122 ms
Average download pause: 1 ms
Minimum round trip time to server: 59 ms
Average round trip time to server: 87 ms
Estimated download bandwidth: 12446 kbps
Route concurrency: 1.2840027
Download TCP forced idle: 51 %
Maximum route speed: --

VoIP test statistics
--------------------
Jitter: you --> server: 0.5 ms
Jitter: server --> you: 13.6 ms
Packet loss: you --> server: 0.0 %
Packet loss: server --> you: 0.0 %
Packet discards: 0.0 %
Packets out of order: 0.0 %
Estimated MOS score: 3.9
I guess a MOS score of 2.5 is below what's acceptable, but please
comment.

-- 
Janos Dohanics