can anyone tell me if the cisco have the PSTN transmission network devices or not?now i want to know the PSTN structure details,could you give me a usful link?,can anybody give me a conplete toplogy of the ISP.thanks in advance.
As far as I know, Cisco provides PSTN network devices for eg. PSTN Gateway Solution i.e the PGW 2200 Softswitch, Switches and Routers. You could use the following link for a few scenarios on Telco and ISP dial up.
