Re: QOS VOIP - Hosted IP PBX Provider

Sorry, forgot to insert the URL:

http://www.cisco.com/application/pdf/en/us/guest/netsol/ns432/c649/ccmigration_09186a008049b062.pdf

Good luck,

Mike
CCNP, CCDP, CCSP, CCVP, MCSE W2K, MCSE+I, Security+, etc.
CCIE R&S (in progress), CCIE Voice (in progress)
------
Headset Adapters for Cisco IP Phones
www.ciscoheadsetadapter.com
www.headsetadapter.com

"bill the kid" <pilotnine@xxxxxxxxx> wrote in message
news:75396aeb-d536-4038-8d72-a52f98bc5a28@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Jul 4, 9:48 am, "headsetadapter.com" <for-s...@xxxxxxxx> wrote:
Bill,

If your T1 used not only for telephony, then you definitely need to
configure QoS on the router, as well as on your switches, as well as
confirm
the configuration on the provider side. Here is a great document on all
aspects of QoS on Cisco devices (it's "best practices" for Quality of
Service).

In general, you must configure QoS on all your devices - the router, LAN
switches, phones. For example, if you configured QoS on the router, but
your
LAN switch strips QoS marking, your QoS will not work. Or if your phone
sends other information, than router expects. Here is a list of what you
should do:

1. On the Router configure Priority Queuing (page 185)
2. On the Router configure Traffic Shaping for the voice (pages 206-215)
based on number of calls you expect.
3. On the switch(es) configure CoS trust (pick the section in the menu
depending on model of your switch)
4. Confirm with the provider, what DSCP values do they expect.

Also, since you have a firewall between your LAN and the router, things
may
become more complicated, since firewalls (except the latest code of Cisco
ASA) do not understand and do not conform the QoS settings. So, you may
need
to re-classify all voice traffic at the router.

Also, if you don't feel comfortable with doing all this stuff yourself, I
would advice you to get a consultant, who will do all this changes for
you.
Believe me, it will be faster and cheaper.

Good luck,

Mike
CCNP, CCDP, CCSP, CCVP, MCSE W2K, MCSE+I, Security+, etc.
CCIE R&S (in progress), CCIE Voice (in progress)
------
Headset Adapters for Cisco IP
Phoneswww.ciscoheadsetadapter.comwww.headsetadapter.com

<pilotn...@xxxxxxxxx> wrote in message

news:9e4f263b-5d82-4eff-832d-d9b30b57daa8@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

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. Hosted provider is
using MGCP and g.721 compression. The T1 line is mostly idle and used
very little for anything other than web surfing and phone calls.T1
line is error free and IP PBX provider checked and claim nothing is
wrong on their end.

Does anyone have a sample QOS configuration that may work? or point me
to the right direction where I may obtain
more information.

IP hosted PBX provider -----Internet Cloud -----Cisco 1720---
Firewall-------Switch---SIP IP phones..

Cisco IOS Software, C1700 Software (C1700-ENTBASE-M), Version
12.3(8)T11, RELEASE SOFTWARE (fc1)
Technical Support:http://www.cisco.com/techsupport
Copyright (c) 1986-2005 by Cisco Systems, Inc.
Compiled Wed 10-Aug-05 19:07 by dchih

ROM: System Bootstrap, Version 12.2(7r)XM1, RELEASE SOFTWARE (fc1)

Thanks!

Bill



Mike,

Thank you for your suggestion. Do you have a URL or the author of the
mentioned doc - "Here is a great document on all
aspects of QoS on Cisco devices (it's "best practices" for Quality of
Service). "

Thanks!

Bill


.

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