SPAN Problem

Dear Experts,

I have deployed SPAN on a 4506 Catalyst Switch for the purpose of voice
recording.The configuration looks as follows:

monitor session 1 source interface
monitor session 1 destination interface

The thing is that I am getting the voice call between two users in the wrong
order. The recorded voice call looks like:

I am fine..
How are you?

Can someone suggest me a good way to solve this.

-- 
KJ
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