Hey i dont use ATA's much, except for faxing. However today i had to deploy one for a client and it failed miserably with horrible call quality. I was wondering if anyone knew why. First piece of evidence is that my ping time across the lan to these ATA's is 60-70ms ( time=65ms TTL=249 ), whereas desk phones like a 8841 are all 1ms. All computers on the lan are 1-3ms. Only the ATA's are poor quality pings and are on the same vlan as the phones so it doesnt make sense to me.
Below is the config i am using for the ATA's. Like i said, doesnt matter what switch on site i plug them into they are all doing the same thing. I have 6 ata's. For faxing it does not seem to matter, but for voice it does matter, which is why i never noticed the call quality problems before.
description "manually configured ATA"
switchport mode access
switchport block unicast
switchport voice vlan 2
switchport port-security maximum 3
switchport port-security maximum 2 vlan access
switchport port-security violation restrict
switchport port-security aging time 1
switchport port-security aging type inactivity
power inline auto max 15400
srr-queue bandwidth share 1 30 35 5
mls qos trust device cisco-phone
mls qos trust cos
no macro auto processing
auto qos voip cisco-phone
storm-control broadcast level pps 1k
storm-control multicast level pps 2k
storm-control action trap
nmsp attachment suppress
spanning-tree bpdufilter enable
spanning-tree bpduguard enable
service-policy input AUTOQOS-SRND4-CISCOPHONE-POLICY
ip dhcp snooping limit rate 15
a traceroute is one hop to our nexus router.
Any ideas? Is it because they are all running at 10mbps half duplex? is it a codec issue?
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