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Voip and QoS problems!!!!

Hello

I'm working in deploying QoS in a branch office

but I'm getting poor voice quality on calls.

here is the configuration of the QoS parameters

*****************************************class-map match-all VOZ

match dscp ef

class-map match-all VOZ(SIGNAL)

match dscp af31

class-map match-all APLICACION-CRITICA

match access-group name AS400

!

!

policy-map POLITICAS-QoS

class VOZ

priority percent 60

class VOZ(SIGNAL)

bandwidth percent 5

class APLICACION-CRITICA

bandwidth percent 10

class class-default

fair-queue

*****************************************

!

!

!

interface FastEthernet0/0

description LAN

ip address 10.12.1.1 255.255.255.0

speed auto

!

interface Serial0/0

description Link to HQ

bandwidth 128

ip address 192.168.50.42 255.255.255.252

service-policy output POLITICAS-QoS

load-interval 60

compress stac

!

interface BRI1/0

no ip address

shutdown

!

ip classless

ip route 0.0.0.0 0.0.0.0 Serial0/0

ip route 16.0.0.0 255.255.255.0 Serial0/0

no ip http server

!

ip access-list extended AS400

permit ip any host 16.0.0.2

Now take a look at the Output of the show policy-map interface serial 0/0

CS-1760-PN#show policy-map interface serial 0/0

Serial0/0

Service-policy output: POLITICAS-QoS

Class-map: VOZ (match-all)

1034703 packets, 66220992 bytes

1 minute offered rate 147000 bps, drop rate 71000 bps

Match: dscp ef

Queueing

Strict Priority

Output Queue: Conversation 40

Bandwidth 60 (%)

Bandwidth 76 (kbps) Burst 1900 (Bytes)

(pkts matched/bytes matched) 1034703/66220992

(total drops/bytes drops) 530418/33946752

Class-map: VOZ(SIGNAL) (match-all)

0 packets, 0 bytes

1 minute offered rate 0 bps, drop rate 0 bps

Match: dscp af31

Queueing

Output Queue: Conversation 41

Bandwidth 5 (%)

Bandwidth 6 (kbps) Max Threshold 64 (packets)

(pkts matched/bytes matched) 0/0

(depth/total drops/no-buffer drops) 0/0/0

Class-map: APLICACION-CRITICA (match-all)

1423 packets, 84273 bytes

1 minute offered rate 0 bps, drop rate 0 bps

Match: access-group name AS400

Queueing

Output Queue: Conversation 42

Bandwidth 10 (%)

Bandwidth 12 (kbps) Max Threshold 64 (packets)

(pkts matched/bytes matched) 1423/84273

(depth/total drops/no-buffer drops) 0/0/0

Class-map: class-default (match-any)

38296 packets, 21064743 bytes

1 minute offered rate 47000 bps, drop rate 0 bps

Match: any

Queueing

Flow Based Fair Queueing

Maximum Number of Hashed Queues 32

(total queued/total drops/no-buffer drops) 11/130/0

CS-1760-PN#

As you can see there are A LOT of packets being dropped

related to DSCP ef (voice bearer packets) but there are

actually 0 (ZERO!!) calls being place at this time

Notice that there is also 0 packets matching DSCP af31 (voice signaling)

Can anyone tell me what might be happeing here ??

Why am I getting so many drops ?

Thanks

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