Re: QOS VOIP - Hosted IP PBX Provider
- From: John Osmon <josmon@xxxxxxxxxxxxxxxxxxxx>
- Date: 7 Jul 2008 23:19:35 -0700
pilotnine@xxxxxxxxx wrote:
: Hi,
: Cisco 1720 router with 1 internet T1 to a IP PBX hosted provider.
: I am having constant dropped calls, choppy, echoes, backup noises and
: clipped calls when using the IP phone. I would like to implement QOS
: on router, and am wondering if this will help.
Don't forget -- QOS on your 1720 only queues things on the egress of
your network. Your provider has to provide queuing for the ingress.
A better solution is to buy a bigger pipe, but that isn't always
an economical solution.
I sell a hosted PBX product. We try to make sure we also sell the
Internet access so that we can control packet flow to the customer
premise. It helps us eliminate a number of the quality issues that
other hosted companies run into.
We also keep all of our VOIP gear in a single /24, so that customers can
prioritize packets in our direction based on IP address. A lot of cheap
equipment allows you to priority-queue things based on IP addresses.
(Actiontec ADSL equipment comes to mind...)
An old-school Cisco template for priority queueing would look like:
!
interface Serial0
priority-group 1
!
access-list 112 permit ip any <voiop-ip-block> <mask>
!
priority-list 1 protocol ip high list 112
This template is likely to work on your 1720 -- but doesn't use the
newer modular QOS mechanisms, so is likely to draw ire from many
directions.
.
- References:
- QOS VOIP - Hosted IP PBX Provider
- From: pilotnine
- QOS VOIP - Hosted IP PBX Provider
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