[asterisk-users] Asterisk Executing outbound dial number twice

[motty.cruz]

Hello, 
I noticed Asterisk 1.8.4.1 execute number dial twice 

Log

 == Using SIP RTP CoS mark 5
    -- Executing [912066604 at sipphones:1] Set("SIP/4773-0003e920",
"CALLERID(num)=2066604") in new stack
  == Extension Changed 4773[sipphones] new state InUse for Notify User 4701 
    -- Executing [912066604 at sipphones:2] Dial("SIP/4773-0003e920",
"SIP/att/xxxxxxx,80") in new stack

Can you please help? 

Thanks, 
Motty