Yes...this is what we do... my concern has been "TELLING THE AP" that this 
traffic has precedence over any other types of traffic "JUST IN CASE" the AP is 
taxed in terms of available airtime / bandwidth.

So based on this I would have to set the Codepoint 46 to priority 7 on the AP 
Diffserve TAB
SM turn on High priority then set the SM  DIFFSERV Tab Codepoint 46 to priority 
7 and set DIFFSERV first over 802.1p

Cheers,
______________________________
Andreas Wiatowski | CEO
Silo Wireless Inc.
Email  [email protected]
19 Sage Court
Brantford, Ontario N3R 7T4 (CANADA)
Tel +1.519.449.5656  Extension-600|Fax +1.519.449.5536 |Toll Free 
+1.866.727.4138

From: Af [mailto:[email protected]] On Behalf Of Ken Hohhof
Sent: Thursday, January 12, 2017 11:38 AM
To: [email protected]
Subject: Re: [AFMUG] Cambium 450 QOS for Voip

Then I assume the PBX is already setting DSCP on the traffic to the customer, 
and if they have ATAs or IP phones, those probably also set DSCP.

I would not set all traffic from this customer to high priority in the QoS 
router, just the VoIP traffic.


From: Af [mailto:[email protected]] On Behalf Of Andreas Wiatowski
Sent: Thursday, January 12, 2017 10:34 AM
To: [email protected]<mailto:[email protected]>
Subject: Re: [AFMUG] Cambium 450 QOS for Voip

We run our own PBX server and bring trunks to it. The traffic flow comes via 
our PBX... It is on our network and not outsourced.

Thanks for the info.

Cheers,
______________________________
Andreas Wiatowski | CEO
Silo Wireless Inc.
Email  [email protected]<mailto:[email protected]>
19 Sage Court
Brantford, Ontario N3R 7T4 (CANADA)
Tel +1.519.449.5656  Extension-600|Fax +1.519.449.5536 |Toll Free 
+1.866.727.4138

From: Af [mailto:[email protected]] On Behalf Of Ken Hohhof
Sent: Thursday, January 12, 2017 11:27 AM
To: [email protected]<mailto:[email protected]>
Subject: Re: [AFMUG] Cambium 450 QOS for Voip

Yes, you should enable High Priority channel and assign an appropriate amount 
of bandwidth, e.g. 100 kbps times number of simultaneous calls, depending on 
what codec their VoIP is using.  This allocation is only used if needed, it's 
not like some QoS routers which set aside bandwidth only for use by high 
priority traffic.

Most VoIP devices should tag the packets as EF without needing a QoS router to 
do it.

Where you tag the downstream traffic depends on where it is coming from.  Do 
you have your own PBX?  Does it come over a SIP trunk?  Does the RTP traffic 
flow via your PBX or come direct from the underlying CLEC?  I think this 
depends on whether you  enable re-invites?


From: Af [mailto:[email protected]] On Behalf Of Andreas Wiatowski
Sent: Thursday, January 12, 2017 10:13 AM
To: [email protected]<mailto:[email protected]>
Subject: [AFMUG] Cambium 450 QOS for Voip

Hi All,

We have been running VOIP very successfully for quite some time to business 
customers. Typically we put in a QOS router at the premise and mark DSCP and 
prioritize.  My question is, as we fill up AP's we sometimes get comments from 
customers that their VOIP sometimes cuts out..or is choppy....not all the 
time...just the odd time.

Should we be enabling the "HIGH PRIORITY" channel in the SM interface? If so, 
Anything to do at the AP? Does this prioritize DSCP?

[cid:[email protected]]

Cheers,
______________________________
Andreas Wiatowski | CEO
Silo Wireless Inc.
Email  [email protected]<mailto:[email protected]>
19 Sage Court
Brantford, Ontario N3R 7T4 (CANADA)
Tel +1.519.449.5656  Extension-600|Fax +1.519.449.5536 |Toll Free 
+1.866.727.4138

Reply via email to