I have a NM-4A/S serial network module which I suspect is having problem on a Cisco 3640 router. Is there a way which I can test the async ports out without connecting to any other devices? The module info is as shown below.Slot 3:        Sync/Async ...

This may sound weird but does anyone know how I can increase voice transmission delay on Cisco 3600 series router (IOS c3640-is-mz.123-25.bin) analog E&M port?I have a working connection trunk with the config below. The connection trunk interfaces to...

Can someone pls explain to me what is the purpose of port numbers 2000, 3000, 4000? For example, I know if I use port 2097 (2000 + 97) using the example below, I can do a reverse telnet with serial3/0 interface. Are the port numbers (2000/3000/4000) ...

I am trying to find out if its possible to divert an incoming PSTN call through an FXO (origination) port to a FXO/FXS/E&M (destination) port (on the same router) which is always open or off-hook . The incoming call can be automatically answered with...

My situation is this. We are currently subscribing to over 60 analog 4-wire leased lines to different remote sites from our central office. The analog leased lines are used to carry audio traffic from central office's controller to remote sites' anal...