I thing it is not problem with hsrp. did u check the reg value is 0x2102 by command sh version. Ip address which you are using for standby is being used by another machine.or insufficient RAM.

It might be problem with console cable . did you use proper cable.

I think you have WIC Async/sync module. This interface is used for serial 128kbps as well as dial up 56 kbps. we can connect analog modem to this interface using 60 pin towards router serial and 25 (or) 9 pin towards analog modemyou need to get cable...

check keep alive is set to 10 sec. on router interface and switch port interface.

You have missed some config steps in line mode . With your configuration router side modem CD ( Carrier ditect ) will not reflect on your router and line gets disconnected and async interface will not come up. CD is reflected on PC and Router for s...