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ASA 5510 QOS for VOIP

We have an asa5510 firewall and have switched over to a VOIP PBX system. I am trying to get it setup to have the SIP traffice the highest priority, and I am getting confused. Everything I read and have tried does not seem to work. We have a 20 MB fiber coming in and right now the phone system is not set on a different vlan. I am leaning on moving it to a seperate vlan, but we have plenty of bandwith, that is why I didn't set it up that way in the first place. Here is what I have for our policies. We are running 8.0(2).

policy-map type inspect dns preset_dns_map

parameters

  message-length maximum 512

policy-map global-policy

class global-class

  inspect ftp

  inspect http

  inspect pptp

policy-map public-policy

class public-class

  inspect http

  police output 1500000 1500

  police input 1500000 1500

policy-map qos

class voice

  priority

service-policy global-policy global

service-policy qos interface outside

service-policy public-policy interface public

Our priority-queue stats are:

Priority-Queue Statistics interface outside

Queue Type         = BE
Tail Drops         = 0
Reset Drops        = 0
Packets Transmit   = 37891679
Packets Enqueued   = 0
Current Q Length   = 0
Max Q Length       = 0

Queue Type         = LLQ
Tail Drops         = 0
Reset Drops        = 0
Packets Transmit   = 0
Packets Enqueued   = 0
Current Q Length   = 0
Max Q Length       = 0

So it looks like nothing is going through LLQ. What is the best way to get this setup. I have read the following, but the only thing I don't have, and maybe it is the problem is I don't have policeing setup.

http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_tech_note09186a008084de0c.shtml#llque

Thanks

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