Hi Mate,Here is a practical answer for you 1. SRST is the standard way of dealing with branches of this size. Depending onhow your network  is structured ( i.e. if one of the branches also have connections to the other branches serving as a sort of B...

Hi Mate,Try this "ip nat inside source static tcp 25 25 extendable"Plus, you are sourcing traffic from the server out and also revceiving, so add the following:"access-list 110 permit tcp any eq 25 host "And, you will be able to send mail as the po...

Have you configured a Media Resource Group List and put it under your phones and gateways, or you are trying to make a conferencethrough a NAT?

Try using Fax Protocol T.37. The 3640 will do the job.BRAndrey

Hi, Try using extended access lists denying the UDP ports on the data interface, or use a routemap. This will do.BRAndrey