Choppy voice

[alex goshtaei]

Hi All;

I have CME which is connected to T1/PRI for the incoming and outgoing calls. Also I configured two Vlans on the LAN, one for voice and the other for data. The caller from outside tells me my voice is so choppy which he couldn't understand. How should I solve this problem?

thanks

Alex

[Brandon Buffin]

Alex,

Are you using an IP phone on the same LAN as the CME? Do you have QoS configured? Check the speed and duplex settings between the CME and the switch. Assuming this is not a gigabit link, these should be hard coded to 100/full such as:

interface fa0/1

speed 100

duplex full

Hope this helps.

Brandon

[rhugo]

Try setting the following QOS on your dial peers and turn off VAD :

dial-peer voice 1 voip

ip qos dscp cs5 media

no vad

here is a good troubleshooting doc for choppy voice QOS issues:

http://www.cisco.com/en/US/partner/tech/tk652/tk698/technologies_tech_note09186a00800f6cf8.shtml

Also, look at a more stable GD for your IOS. I would recommend 12.3(11) T10 with an equivalent CME Feature Set