We have a recently installed the CM 4.2 cluster in Sydney. At Melbourne we have a Cisco 3825 voice gateway SRST router registered with the Sydney CM. We have the Arc server located at Sydney. The receptions at both the sites have got the Arc client installed on their pc's. At the Sydney the reception is happy however at Melbourne : when an external call comes in on the Arc console screen the receptionist has to click on the call twice to attend to it and the when she transfers it takes more time then necessary in comparison to Sydney. It appears that some sort of signalling between the melbourne arc console and the arc server in sydney is delaying things. I have ruled out qos and networking for the moment since everything else is working fine and the call quality is good. We have put the arc signalling between Melbn and Sydney to g711 since arc does not support g729 as we have not enabled the transcoder. Has anybody encountered anything similar before and knows the fix?