if i have 8 sites (sopkes), and a HQ (Hub), each site already has 1841 router and i want to deploy a callmanager in the HQ, and IP phones in all locations, of course all internal calls between sites will traverse the WAN links each through its 1841.
now as known 1841 doesn't work as a gateway, so i want ideas on how to terminate all external calls from all sites to pstn in this case!??
i think a solution could be applicable here that is to install one 28xx/38xx gateway somewhere on one site and all external calls to pstn to go over wan link until it reachs this gateway to be then terminated to pstn but here i need to upgrade all wan links to capable BW....
are there any ideas how to workaround this case